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Effects of molecular design parameters on plasticizer performance in poly(vinyl chloride): A comprehensive molecular simulation study. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Van Bocxlaer K, McArthur KN, Harris A, Alavijeh M, Braillard S, Mowbray CE, Croft SL. Film-Forming Systems for the Delivery of DNDI-0690 to Treat Cutaneous Leishmaniasis. Pharmaceutics 2021; 13:516. [PMID: 33918099 PMCID: PMC8069359 DOI: 10.3390/pharmaceutics13040516] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 11/18/2022] Open
Abstract
In cutaneous leishmaniasis (CL), parasites reside in the dermis, creating an opportunity for local drug administration potentially reducing adverse effects and improving treatment adherence compared to current therapies. Polymeric film-forming systems (FFSs) are directly applied to the skin and form a thin film as the solvent evaporates. In contrast to conventional topical dosage forms, FFSs strongly adhere to the skin, favouring sustained drug delivery to the affected site, reducing the need for frequent applications, and enhancing patient compliance. This study reports the first investigation of the use of film-forming systems for the delivery of DNDI-0690, a nitroimidazole compound with potent activity against CL-causing Leishmania species. A total of seven polymers with or without plasticiser were evaluated for drying time, stickiness, film-flexibility, and cosmetic attributes; three FFSs yielded a positive evaluation for all test parameters. The impact of each of these FFSs on the permeation of the model skin permeant hydrocortisone (hydrocortisone, 1% (w/v) across the Strat-M membrane was evaluated, and the formulations resulting in the highest and lowest permeation flux (Klucel LF with triethyl citrate and Eudragit RS with dibutyl sebacate, respectively) were selected as the FFS vehicle for DNDI-0690. The release and skin distribution of the drug upon application to Leishmania-infected and uninfected BALB/c mouse skin were examined using Franz diffusion cells followed by an evaluation of the efficacy of both DNDI-0690 FFSs (1% (w/v)) in an experimental CL model. Whereas the Eudragit film resulted in a higher permeation of DNDI-0690, the Klucel film was able to deposit four times more drug into the skin, where the parasite resides. Of the FFSs formulations, only the Eudragit system resulted in a reduced parasite load, but not reduced lesion size, when compared to the vehicle only control. Whereas drug delivery into the skin was successfully modulated using different FFS systems, the FFS systems selected were not effective for the topical application of DNDI-0690. The convenience and aesthetic of FFS systems alongside their ability to modulate drug delivery to and into the skin merit further investigation using other promising antileishmanial drugs.
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Affiliation(s)
- Katrien Van Bocxlaer
- Department of Biology, York Biomedical Research Institute, University of York, York YO10 5DD, UK
| | - Kerri-Nicola McArthur
- Pharmidex Pharmaceutical Services Ltd., London EC2V 8AU, UK; (K.-N.M.); (A.H.); (M.A.)
| | - Andy Harris
- Pharmidex Pharmaceutical Services Ltd., London EC2V 8AU, UK; (K.-N.M.); (A.H.); (M.A.)
| | - Mo Alavijeh
- Pharmidex Pharmaceutical Services Ltd., London EC2V 8AU, UK; (K.-N.M.); (A.H.); (M.A.)
| | - Stéphanie Braillard
- Drugs for Neglected Diseases initiative (DNDi), 1202 Geneva, Switzerland; (S.B.); (C.E.M.)
| | - Charles E. Mowbray
- Drugs for Neglected Diseases initiative (DNDi), 1202 Geneva, Switzerland; (S.B.); (C.E.M.)
| | - Simon L. Croft
- Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London WC1E 7HT, UK;
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Klähn M, Krishnan R, Phang JM, Lim FC, van Herk AM, Jana S. Effect of external and internal plasticization on the glass transition temperature of (Meth)acrylate polymers studied with molecular dynamics simulations and calorimetry. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121635] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tran TTD, Tran PHL. Controlled Release Film Forming Systems in Drug Delivery: The Potential for Efficient Drug Delivery. Pharmaceutics 2019; 11:E290. [PMID: 31226748 PMCID: PMC6630634 DOI: 10.3390/pharmaceutics11060290] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/07/2019] [Accepted: 05/19/2019] [Indexed: 12/30/2022] Open
Abstract
Despite many available approaches for transdermal drug delivery, patient compliance and drug targeting at the desired concentration are still concerns for effective therapies. Precise and efficient film-forming systems provide great potential for controlling drug delivery through the skin with the combined advantages of films and hydrogels. The associated disadvantages of both systems (films and hydrogels) will be overcome in film-forming systems. Different strategies have been designed to control drug release through the skin, including changes to film-forming polymers, plasticizers, additives or even model drugs in formulations. In the current review, we aim to discuss the recent advances in film-forming systems to provide the principles and review the methods of these systems as applied to controlled drug release. Advances in the design of film-forming systems open a new generation of these systems.
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Affiliation(s)
- Thao T D Tran
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
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Li D, Panchal K, Mafi R, Xi L. An Atomistic Evaluation of the Compatibility and Plasticization Efficacy of Phthalates in Poly(vinyl chloride). Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00756] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dongyang Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Kushal Panchal
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Roozbeh Mafi
- Canadian General
Tower, Ltd., Cambridge, Ontario N1R 5T6, Canada
| | - Li Xi
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
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Wang X, Xu J, Li L, Liu Y, Li Y, Dong Q. Influences of fluorine on microphase separation in fluorinated polyurethanes. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.06.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Frederiksen K, Guy RH, Petersson K. Formulation considerations in the design of topical, polymeric film-forming systems for sustained drug delivery to the skin. Eur J Pharm Biopharm 2015; 91:9-15. [DOI: 10.1016/j.ejpb.2015.01.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 12/29/2014] [Accepted: 01/07/2015] [Indexed: 12/01/2022]
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New film forming emulsions containing Eudragit® NE and/or RS 30D for sustained dermal delivery of nonivamide. Eur J Pharm Biopharm 2012; 82:291-8. [DOI: 10.1016/j.ejpb.2012.06.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 06/14/2012] [Accepted: 06/17/2012] [Indexed: 11/20/2022]
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Zhang C, Hu J, Ji F, Fan Y, Liu Y. A combined experimental and computational study on the material properties of shape memory polyurethane. J Mol Model 2011; 18:1263-71. [PMID: 21735123 DOI: 10.1007/s00894-011-1098-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 04/15/2011] [Indexed: 11/27/2022]
Abstract
A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material properties were tested by dynamic mechanical analysis (DMA) and Instron, and simulated using fully atomistic molecular dynamics (MD). The glass transition temperature (T (g)) of SMPU60 determined by DMA is 316 K, which is slightly lower than that estimated through MD simulations (T (g) = 328 K) , showing the calculated T ( g ) is in good agreement with experimental data. A complex hydrogen bonding network was revealed with the calculation of radial distribution functions (RDFs). The C═O⋯H bond is the predominant hydrogen-bonding interaction. With increasing temperature, both the hydrogen bonding and the moduli decreased, and the dissociation of intermolecular hydrogen bonding induced the decrease of the moduli.
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Affiliation(s)
- Cuili Zhang
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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Abdel-Halim H, Traini D, Hibbs D, Gaisford S, Young P. Modelling of molecular phase transitions in pharmaceutical inhalation compounds: An in silico approach. Eur J Pharm Biopharm 2011; 78:83-9. [DOI: 10.1016/j.ejpb.2010.12.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 12/02/2010] [Accepted: 12/13/2010] [Indexed: 02/07/2023]
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Seidl M, Loerting T, Zifferer G. Molecular Dynamics Simulations on the Glass-to-liquid Transition in High Density Amorphous Ice. Z PHYS CHEM 2009. [DOI: 10.1524/zpch.2009.6057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
It is an open question whether high density amorphous (HDA) ice is a glassy material structurally related to an ultraviscous high density liquid (HDL) or a nanocrystalline material unrelated to a liquid. In order to shed light on this question we have performed molecular dynamics simulations on a HDA model system at a pressure of p ≈ 0.3 GPa using the COMPASS force field. After removing the irreversible structural relaxation effect by initial isobaric heating/cooling cycles, we observe a deviation from linearity in the density vs. temperature plot in the range 170 ± 15 K in subsequent cycles, which we attribute to the glass-transition temperature T
g. This assignment of T
g is corroborated by two independent methods, namely from a rapid increase in the diffusion coefficient at ≈169 K and a deviation from linearity at ≈174 K in an enthalpy versus temperature plot. The structure of the model system is in good agreement with the experimentally determined structure of HDA. We, thus, suggest that HDA may indeed be a low temperature structural proxy of an ultraviscous liquid HDL.
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Seidl M, Loerting T, Zifferer G. High-density amorphous ice: Molecular dynamics simulations of the glass transition at 0.3 GPa. J Chem Phys 2009; 131:114502. [PMID: 19778124 DOI: 10.1063/1.3224857] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Based on several force fields (COMPASS, modified TIP3P and SPC/E) high-density amorphous ice is simulated by use of isothermal-isobaric molecular dynamics at a pressure of p approximately 0.3 GPa in the temperature range from 70 to 300 K. Starting at low temperature a large number of heating/cooling cycles are performed and several characteristic properties (density, total energy, and mobility) are traced as functions of temperature. While the first cycles are showing irreversible structural relaxation effects data points from further cycles are reproducible and give clear evidence for the existence of a glass-to-liquid transition. Although, the observed transition temperatures T(g) are dependent on the actual force field used and slightly dependent on the method adopted the results indicate that high-density amorphous ices may indeed be low-temperature structural proxies of ultraviscous high-density liquids.
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Affiliation(s)
- M Seidl
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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13
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Effects of propylene glycol on the physical properties of poly(vinyl alcohol) solutions and films. Macromol Res 2009. [DOI: 10.1007/bf03218914] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Maus M, Wagner KG, Kornherr A, Zifferer G. Molecular dynamics simulations for drug dosage form development: thermal and solubility characteristics for hot-melt extrusion. MOLECULAR SIMULATION 2008. [DOI: 10.1080/08927020802411695] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Martin Maus
- a Department of Quality Operations , Boehringer Ingelheim Pharma GmbH & Co. KG , Biberach, Germany
| | - Karl G. Wagner
- b Department of Pharmaceutical Technology , Institute of Pharmacy, University of Tuebingen , Tuebingen, Germany
- c Department of Pharmaceutical Research and Development , Boehringer Ingelheim Pharma GmbH & Co. KG , Biberach, Germany
| | | | - Gerhard Zifferer
- e Department of Physical Chemistry, University of Vienna , Vienna, Austria
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Abou-Rachid H, Lussier LS, Ringuette S, Lafleur-Lambert X, Jaidann M, Brisson J. On the Correlation between Miscibility and Solubility Properties of Energetic Plasticizers/Polymer Blends: Modeling and Simulation Studies. PROPELLANTS EXPLOSIVES PYROTECHNICS 2008. [DOI: 10.1002/prep.200700211] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Modeling and measurement of glass transition temperatures of energetic and inert systems. POLYM ENG SCI 2008. [DOI: 10.1002/pen.21062] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Qi S, Gryczke A, Belton P, Craig DQ. Characterisation of solid dispersions of paracetamol and EUDRAGIT® E prepared by hot-melt extrusion using thermal, microthermal and spectroscopic analysis. Int J Pharm 2008; 354:158-67. [DOI: 10.1016/j.ijpharm.2007.11.048] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Revised: 11/22/2007] [Accepted: 11/28/2007] [Indexed: 10/22/2022]
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18
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Zhang J, Lou J, Ilias S, Krishnamachari P, Yan J. Thermal properties of poly(lactic acid) fumed silica nanocomposites: Experiments and molecular dynamics simulations. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.02.048] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Li DX, Liu BL, Liu YS, Chen CL. Predict the glass transition temperature of glycerol–water binary cryoprotectant by molecular dynamic simulation. Cryobiology 2008; 56:114-9. [DOI: 10.1016/j.cryobiol.2007.11.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2007] [Revised: 11/21/2007] [Accepted: 11/28/2007] [Indexed: 11/24/2022]
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20
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Simperler A, Kornherr A, Chopra R, Jones W, Motherwell WDS, Zifferer G. The glass transition temperatures of amorphous trehalose–water mixtures and the mobility of water: an experimental and in silico study. Carbohydr Res 2007; 342:1470-9. [PMID: 17511976 DOI: 10.1016/j.carres.2007.04.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2006] [Revised: 04/06/2007] [Accepted: 04/11/2007] [Indexed: 11/24/2022]
Abstract
Isothermal-isobaric molecular dynamics simulations are used to calculate the specific volume of models of trehalose and three amorphous trehalose-water mixtures (2.9%, 4.5% and 5.3% (w/w) water, respectively) as a function of temperature. Plots of specific volume versus temperature exhibit a characteristic change in slope when the amorphous systems change from the glassy to the rubbery state and the intersection of the two regression lines provides an estimate of the glass transition temperature T(g). A comparison of the calculated and experimental T(g) values, as obtained from differential scanning calorimetry, shows that despite the predicted values being systematically higher (about 21-26K), the trend and the incremental differences between the T(g) values have been computed correctly: T(g)(5.3%(w/w))<T(g)(4.5%(w/w))<T(g)(2.9%(w/w))<T(g)(0.0%(w/w)). The mobility of water has been investigated over temperature ranges covering the rubbery and the glassy phases of the trehalose-water mixtures by calculating the diffusion coefficients of water. The temperature dependence of the diffusion coefficient changes in the region of the glass transition and can be used as well to estimate T(g) values. The activation energies for water diffusion were found to be independent of the amount of water in amorphous trehalose.
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Affiliation(s)
- Alexandra Simperler
- The Pfizer Institute for Pharmaceutical Materials Science, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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Zhang J, Liang Y, Yan J, Lou J. Study of the molecular weight dependence of glass transition temperature for amorphous poly(l-lactide) by molecular dynamics simulation. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.06.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Simperler A, Kornherr A, Chopra R, Bonnet PA, Jones W, Motherwell WDS, Zifferer G. Glass Transition Temperature of Glucose, Sucrose, and Trehalose: An Experimental and in Silico Study. J Phys Chem B 2006; 110:19678-84. [PMID: 17004837 DOI: 10.1021/jp063134t] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Isothermal-isobaric molecular dynamics simulations are used to calculate the specific volume of models of different amorphous carbohydrates (glucose, sucrose, and trehalose) as a function of temperature. Plots of specific volume vs temperature exhibit a characteristic change in slope when the amorphous systems change from the glassy to the rubbery state. The intersection of the regression lines of data below (glassy state) and above (rubbery state) the change in slope provides the glass transition temperature (T(g)). These predicted glass transition temperatures are compared to experimental T(g) values as obtained from differential scanning calorimetry measurements. As expected, the predicted values are systematically higher than the experimental ones (about 12-34 K) as the cooling rates of the modeling methods are about a factor of 10(12) faster. Nevertheless, the calculated trend of T(g) values agrees exactly with the experimental trend: T(g)(glucose) < T(g)(sucrose) < T(g)(trehalose). Furthermore, the relative differences between the glass transition temperatures were also computed precisely, implying that atomistic molecular dynamics simulations can reproduce trends of T(g) values in amorphous carbohydrates with high quality.
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Affiliation(s)
- Alexandra Simperler
- The Pfizer Institute for Pharmaceutical Materials Science, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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