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Jones TH, Harrison DP, Menegatti C, Mevers E, Knott K, Marek P, Hennen DA, Kasson MT, Macias AM, Lovett B, Saporito RA. Deoxybuzonamine Isomers from the Millipede Brachycybe lecontii (Platydesmida: Andrognathidae). JOURNAL OF NATURAL PRODUCTS 2022; 85:1134-1140. [PMID: 35389651 DOI: 10.1021/acs.jnatprod.2c00077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Millipedes (Diplopoda) are well known for their toxic or repellent defensive secretions. Here, we describe (6aR,10aS,10bR)-8,8-dimethyldodecahydropyrrolo[2,1-a]isoquinoline [trans-anti-trans-deoxybuzonamine (1a)] and (rel-6aR,10aR,10bR)-8,8-dimethyldodecahydropyrrolo[2,1-a]isoquinoline [trans-syn-cis-deoxybuzonamine (1b)], two isomers of deoxybuzonamine found in the chemical defense secretions of the millipede Brachycybe lecontii Wood (Colobognatha, Platydesmida, Andrognathidae). The carbon-nitrogen skeleton of these compounds was determined from their MS and GC-FTIR spectra obtained from the MeOH extract of whole millipedes, along with a subsequent selective synthesis. Their structures were established from their 1D (1H, 13C) and 2D NMR (COSY, NOESY, multiplicity-edited HSQC, HSQC-TOCSY, HMBC) spectra. Additionally, computational chemistry (DFT and DP4) was used to identify the relative configurations of 1a and 1b by comparing predicted 13C data to their experimental values, and the absolute configuration of 1a was determined by comparing its experimental specific rotation with that of the computationally calculated value. This is the first report of dodecahydropyrrolo[2,1-a]isoquinoline alkaloids from a platydesmidan millipede.
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Affiliation(s)
- Tappey H Jones
- Department of Chemistry, Virginia Military Institute, Lexington, Virginia 24450, United States
| | - Daniel P Harrison
- Department of Chemistry, Virginia Military Institute, Lexington, Virginia 24450, United States
| | - Carla Menegatti
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Emily Mevers
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kenneth Knott
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Paul Marek
- Department of Entomology, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Derek A Hennen
- Department of Entomology, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Matt T Kasson
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Angie M Macias
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Brian Lovett
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Ralph A Saporito
- Department of Biology, John Carroll University, University Heights, Ohio 44118, United States
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2
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Chen J, Liu B. Remote Chirality Transfer through Medium Cycle Formation/Intramolecular Hydride Transfer Cascade. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Juan Chen
- Analytical & Testing Center, Sichuan University Chengdu Sichuan 610064 China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University Chengdu Sichuan 610064 China
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3
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Parsons DE, Frontier AJ. Noncanonical Cation-π Cyclizations of Alkylidene β-Ketoesters: Synthesis of Spiro-fused and Bridged Bicyclic Ring Systems. Org Lett 2019; 21:2008-2012. [PMID: 30869901 DOI: 10.1021/acs.orglett.9b00094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three cation-π cyclization cascades initiated at alkylidene β-ketoesters bearing pendent alkenes are described. Depending upon the alkene substitution pattern and the reaction conditions employed, it is possible to achieve selective synthesis of the three different types of products, including 1-halo-3-carbomethoxycyclohexanes, spiro-fused tricyclic systems, and [4.3.1] bridged bicyclic ring systems. All three reactions begin with 6- endo addition of an olefin to the alkylidene β-ketoester electrophile, followed by one of three different cation capture events.
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Affiliation(s)
- Dylan E Parsons
- Department of Chemistry , University of Rochester , 414 Huchison Hall, 100 Trustee Road , Rochester , New York 14611 , United States
| | - Alison J Frontier
- Department of Chemistry , University of Rochester , 414 Huchison Hall, 100 Trustee Road , Rochester , New York 14611 , United States
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4
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Ji KL, Fan YY, Ge ZP, Sheng L, Xu YK, Gan LS, Li JY, Yue JM. Maximumins A–D, Rearranged Labdane-Type Diterpenoids with Four Different Carbon Skeletons from Amomum maximum. J Org Chem 2018; 84:282-288. [DOI: 10.1021/acs.joc.8b02665] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kai-Long Ji
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Yao-Yue Fan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Zhan-Peng Ge
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Li Sheng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - You-Kai Xu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China
| | - Li-She Gan
- Institute of Modern Chinese Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jing-Ya Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
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5
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Deny LJ, Traboulsi H, Cantin AM, Marsault É, Richter MV, Bélanger G. Bis-Michael Acceptors as Novel Probes to Study the Keap1/Nrf2/ARE Pathway. J Med Chem 2016; 59:9431-9442. [PMID: 27682717 DOI: 10.1021/acs.jmedchem.6b01132] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a master regulator that promotes the transcription of cytoprotective genes in response to oxidative/electrophilic stress. Various Michael-type compounds were designed and synthesized, and their potency to activate the Keap1/Nrf2/ARE pathway was evaluated. Compounds bearing two Michael-type acceptors proved to be the most active. Tether length and rigidity between the acceptors was crucial. This study will help to understand how this feature disrupts the interaction between Keap1 and Nrf2.
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Affiliation(s)
- Ludovic J Deny
- Département de Chimie, Université de Sherbrooke , 2500 Boulevard Université, Sherbrooke, Québec J1K 2R1, Canada.,Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada
| | - Hussein Traboulsi
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada.,Département de Médecine, Service de Pneumologie et Centre de Recherche Clinique, Centre Hospitalier de l'Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada
| | - André M Cantin
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada.,Département de Médecine, Service de Pneumologie et Centre de Recherche Clinique, Centre Hospitalier de l'Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada
| | - Éric Marsault
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada.,Département de Pharmacologie, Université de Sherbrooke , Sherbrooke, Québec J1K 2R1, Canada
| | - Martin V Richter
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada.,Département de Médecine, Service de Pneumologie et Centre de Recherche Clinique, Centre Hospitalier de l'Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada
| | - Guillaume Bélanger
- Département de Chimie, Université de Sherbrooke , 2500 Boulevard Université, Sherbrooke, Québec J1K 2R1, Canada.,Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke , Sherbrooke, Québec J1H 5N4, Canada
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6
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Hong YJ, Tantillo DJ. The energetic viability of an unexpected skeletal rearrangement in cyclooctatin biosynthesis. Org Biomol Chem 2015; 13:10273-8. [DOI: 10.1039/c5ob01785h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Results of density functional theory calculations on possible mechanisms for formation of the diterpenoid cyclooctatin are described.
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Affiliation(s)
- Young J. Hong
- Department of Chemistry
- Univeristy of California-Davis
- Davis
- USA
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7
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Haibach MC, Seidel D. C-H-Funktionalisierung über intramolekularen Hydridtransfer. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201306489] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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8
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Haibach MC, Seidel D. CH Bond Functionalization through Intramolecular Hydride Transfer. Angew Chem Int Ed Engl 2014; 53:5010-36. [DOI: 10.1002/anie.201306489] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Michael C. Haibach
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901 (USA) seidel.rutchem.rutgers.edu http://www.seidel‐group.com
| | - Daniel Seidel
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901 (USA) seidel.rutchem.rutgers.edu http://www.seidel‐group.com
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9
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Wong YC, Kao TT, Yeh YC, Hsieh BS, Shia KS. Palladium(0)/Copper(I)-Catalyzed Tandem Cyclization of Aryl 1-Cyanoalk-5-ynyl Ketone System: Rapid Assembly of Cyclopenta[b]naphthalene and Benzo[b]fluorene Derivatives. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300107] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Mei RH, Liu ZG, Cheng H, Xu L, Wang FP. Synthesis of the 10-Azatricyclo[3.3.2.04,8]decane Core of C20-Diterpenoid Alkaloid Racemulsonine via Iodine(III) Promoted Transannular Aziridination Reaction. Org Lett 2013; 15:2206-9. [PMID: 23587046 DOI: 10.1021/ol400755x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ru-Huai Mei
- Key Laboratory of Drug Targeting, Ministry of Education, and Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, P. R. China
| | - Zhi-Gang Liu
- Key Laboratory of Drug Targeting, Ministry of Education, and Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, P. R. China
| | - Hang Cheng
- Key Laboratory of Drug Targeting, Ministry of Education, and Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, P. R. China
| | - Liang Xu
- Key Laboratory of Drug Targeting, Ministry of Education, and Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, P. R. China
| | - Feng-Peng Wang
- Key Laboratory of Drug Targeting, Ministry of Education, and Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, P. R. China
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11
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Wong YC, Tseng CT, Kao TT, Yeh YC, Shia KS. Tandem cyclization of α-cyano α-alkynyl aryl ketones induced by tert-butyl hydroperoxide and tetrabutylammonium iodide. Org Lett 2012. [PMID: 23190145 DOI: 10.1021/ol3028972] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The radical cascade protocol of the α-cyano α-TMS/aryl-capped alkynyl aryl ketones promoted by tert-butyl hydroperoxide under catalysis with tetrabutylammonium iodide in refluxing benzene has been developed, leading to the construction of a variety of highly functionalized [6,6,5] tricyclic frameworks in an efficient manner.
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Affiliation(s)
- Ying-Chieh Wong
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C
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12
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Wong YC, Hsieh MT, Amancha PK, Chin CL, Liao CF, Kuo CW, Shia KS. Autoxidative Annulation Cascade of the α-Cyano β-TMS-capped Alkynyl Cycloalkanone System. Org Lett 2011; 13:896-9. [DOI: 10.1021/ol102947u] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ying-Chieh Wong
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Min-Tsang Hsieh
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Prashanth K. Amancha
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Chih-Lung Chin
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Cheng-Feng Liao
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Chun-Wei Kuo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
| | - Kak-Shan Shia
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 35053, Taiwan, R. O. C., and Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 30013, Taiwan, R. O. C
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13
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Zheng Z, Tang L, Fan Y, Qi X, Du Y, Zhang-Negrerie D. Oxidative aromatic C–N bond formation: convenient synthesis of N-amino-3-nitrile-indoles via FeBr3-mediated intramolecular cyclization. Org Biomol Chem 2011; 9:3714-25. [DOI: 10.1039/c1ob05069a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Rao W, Chan PWH. Unexpected iron(iii) chloride-catalysed dimerisation of 1,1,3-trisubstituted-prop-2-yn-1-ols as an expedient route to highly conjugated indenes. Org Biomol Chem 2010; 8:4016-25. [DOI: 10.1039/c003522j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Hsieh MT, Chou HH, Liu HJ, Wu HM, Ly TW, Wu YK. Polyene Cyclization Promoted by the Cross-Conjugated α-Carbalkoxy Cyclohexenone System. An Unusual 1,2-Hydride Shift under Lewis Acid Catalysis. Org Lett 2009; 11:1673-5. [DOI: 10.1021/ol802878t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Min-Tsang Hsieh
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
| | - Ho-Hsuan Chou
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
| | - Hsing-Jang Liu
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
| | - Huang-Min Wu
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
| | - Tai Wei Ly
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
| | - Yen-Ku Wu
- Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, R.O.C., Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C., and Axikin Pharmaceuticals, Inc., 10835 Road to the Cure, Suite 250, San Diego, California 92121
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