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Kutsumura N, Koyama Y, Suzuki Y, Tominaga KI, Yamamoto N, Saitoh T, Nagumo Y, Nagase H. Favorskii-Type Rearrangement of the 4,5-Epoxymorphinan Skeleton. Org Lett 2018. [PMID: 29513016 DOI: 10.1021/acs.orglett.8b00288] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aldol condensation of naltrexone with various aryl aldehydes gives the corresponding 7-benzylidenenaltrexone derivatives in high yields. However, novel C-ring-contracted morphinan compounds were produced when 2-pyridinecarboxaldehyde or its related analogues were used as a coupling partner. The key structural feature was the existence of the tetrahydrofuran ring (4,5-epoxy ring, E-ring) of the morphinan skeleton. The time-resolved in situ IR spectroscopy of the reaction system indicated the short-lived absorption of the distorted cyclopropanone intermediate.
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Affiliation(s)
- Noriki Kutsumura
- International Institute for Integrative Sleep Medicine (WPI-IIIS) , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
| | - Yasuaki Koyama
- Graduate School of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8571 , Japan
| | - Yuko Suzuki
- Graduate School of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8571 , Japan
| | - Ken-Ichi Tominaga
- National Institute of Advanced Industrial Science and Technology (AIST) , Central 5 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
| | - Naoshi Yamamoto
- International Institute for Integrative Sleep Medicine (WPI-IIIS) , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
| | - Tsuyoshi Saitoh
- International Institute for Integrative Sleep Medicine (WPI-IIIS) , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
| | - Yasuyuki Nagumo
- International Institute for Integrative Sleep Medicine (WPI-IIIS) , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
| | - Hiroshi Nagase
- International Institute for Integrative Sleep Medicine (WPI-IIIS) , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan.,Graduate School of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8571 , Japan
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2
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Nemoto T, Ida Y, Iihara Y, Nakajima R, Hirayama S, Iwai T, Fujii H, Nagase H. The most effective influence of 17-(3-ethoxypropyl) substituent on the binding affinity and the agonistic activity in KNT-127 derivatives, δ opioid receptor agonists. Bioorg Med Chem 2013; 21:7628-47. [PMID: 24262888 DOI: 10.1016/j.bmc.2013.10.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/21/2013] [Accepted: 10/22/2013] [Indexed: 10/26/2022]
Abstract
We investigated the structure-activity relationship of KNT-127 (opioid δ agonist) derivatives with various 17-substituents which are different in length and size. The 17-substituent in KNT-127 derivatives exerted a great influence on the affinity and agonistic activity for the δ receptor. While the compounds with electron-donating 17-substituents showed higher affinities for the δ receptor than those with electron-withdrawing groups, KNT-127 derivatives with 17-fluoroalkyl groups (the high electron-withdrawing groups) showed high selectivities for the δ receptor among evaluated compounds. In addition, the basicity of nitrogen as well as the structure of the 17-N substituent such as the length and configuration at an asymmetric carbon atom contributed to agonist properties for the δ receptor. Thus, the analog with a 17-(3-ethoxypropyl) group showed the best selectively and potent agonistic activity for the δ receptor among KNT-127 derivatives. These findings should be useful for designing novel δ selective agonists.
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Affiliation(s)
- Toru Nemoto
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
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3
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Fujii H, Imaide S, Hirayama S, Nemoto T, Gouda H, Hirono S, Nagase H. Essential structure of opioid κ receptor agonist nalfurafine for binding to the κ receptor 3: synthesis of decahydro(iminoethano)phenanthrene derivatives with an oxygen functionality at the 3-position and their pharmacologies. Bioorg Med Chem Lett 2012; 22:7711-4. [PMID: 23103094 DOI: 10.1016/j.bmcl.2012.09.101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 09/24/2012] [Accepted: 09/27/2012] [Indexed: 10/27/2022]
Abstract
To clarify the essential structures of an opioid κ receptor selective agonist, nalfurafine, for binding to the κ receptor, we designed and synthesized the decahydro(iminoethano)phenanthrene derivatives with an oxygen functionality at the 3-position. The introduction of a hydroxy group to the derivatives increased the affinity and selectivity to the κ receptor regardless of the configuration at the 3-position. However, their affinities were lower than those of nalfurafine with the phenolic hydroxy group. The results suggested that the acidity of the hydroxy group would play an important role in the interaction with the opioid receptor. The low affinities of the 3-keto derivatives indicated that the 3-hydroxy group may participate in the hydrogen bonding with the receptor site not as a hydrogen acceptor but as a hydrogen donor. This is the first experimental evidence for a role as a hydrogen donor for the 3-hydroxy group in morphinans. Furthermore, the κ selectivities in these derivatives with the 6α-amide side chain were affected by the the 3-hydroxy group. The obtained structure-activity relationship information is expected to be useful for the design of more selective ligands for the κ receptor.
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Affiliation(s)
- Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
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4
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Synthesis of quinolinomorphinan derivatives as highly selective δ opioid receptor ligands. Bioorg Med Chem 2012; 20:5810-31. [DOI: 10.1016/j.bmc.2012.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 08/06/2012] [Accepted: 08/06/2012] [Indexed: 11/17/2022]
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5
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Essential structure of opioid κ receptor agonist nalfurafine for binding to the κ receptor 2: synthesis of decahydro(iminoethano)phenanthrene derivatives and their pharmacologies. Bioorg Med Chem Lett 2012; 22:5071-4. [PMID: 22742909 DOI: 10.1016/j.bmcl.2012.05.122] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 05/30/2012] [Accepted: 05/31/2012] [Indexed: 11/22/2022]
Abstract
To clarify the essential structures of an opioid κ receptor selective agonist, nalfurafine, for binding to the κ receptor, we designed and synthesized some nalfurafine derivatives and the decahydro(iminoethano)phenanthrene derivatives with a cyclohexene moiety as a surrogate for the phenol ring. In addition to the 6-amide side chain and the 17-nitrogen substituted by a cyclopropylmethyl group, the 4,5-epoxy ring, phenolic hydroxy group, and angular hydroxy group played important roles in eliciting the binding properties of nalfurafine but these three moieties were not indispensable for binding to the κ receptor. Moreover, the phenol ring was also not essential for the binding to the κ receptor, and the cyclohexene moiety would play an important role in fixing the conformation of decahydro(iminoethano)phenanthrene derivatives to effectively raise the amide side chain, rendering a conformation that resembled the active one of nalfurafine.
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Ida Y, Nemoto T, Hirayama S, Fujii H, Osa Y, Imai M, Nakamura T, Kanemasa T, Kato A, Nagase H. Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists. Bioorg Med Chem 2012; 20:949-61. [DOI: 10.1016/j.bmc.2011.11.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 11/22/2011] [Accepted: 11/22/2011] [Indexed: 11/29/2022]
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8
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Yamamoto N, Fujii H, Imaide S, Hirayama S, Nemoto T, Inokoshi J, Tomoda H, Nagase H. Synthesis of (−)-Homogalanthamine from Naltrexone. J Org Chem 2011; 76:2257-60. [DOI: 10.1021/jo1022487] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoshi Yamamoto
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hideaki Fujii
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Satomi Imaide
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Shigeto Hirayama
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Toru Nemoto
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Junji Inokoshi
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroshi Tomoda
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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Fujii H, Ida Y, Hanamura S, Osa Y, Nemoto T, Nakajima M, Hasebe K, Nakao K, Mochizuki H, Nagase H. Synthesis of pyrrolomorphinan derivatives as κ opioid agonists. Bioorg Med Chem Lett 2010; 20:5035-8. [DOI: 10.1016/j.bmcl.2010.07.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Revised: 07/08/2010] [Accepted: 07/09/2010] [Indexed: 11/27/2022]
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10
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Nagase H, Nemoto T, Matsubara A, Saito M, Yamamoto N, Osa Y, Hirayama S, Nakajima M, Nakao K, Mochizuki H, Fujii H. Design and synthesis of KNT-127, a δ-opioid receptor agonist effective by systemic administration. Bioorg Med Chem Lett 2010; 20:6302-5. [PMID: 20850307 DOI: 10.1016/j.bmcl.2010.08.083] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 08/17/2010] [Accepted: 08/18/2010] [Indexed: 10/19/2022]
Abstract
We have reported previously the novel δ-opioid agonist, SN-28, which was more potent in in vitro assays than the prototype δ-agonists, TAN-67 and SNC-80. However, when administered by subcutaneous injection, this compound showed no analgesic effect at dosages greater than 30mg/kg in the acetic acid writhing test. We speculated that SN-28 was not effective in the test because the presence of the charged ammonium groups prevented its penetration through the blood-brain barrier. On the basis of our proposal, we designed the novel δ-agonist, KNT-127, which was effective with systemic administration.
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Affiliation(s)
- Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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11
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Nagase H, Imaide S, Tomatsu M, Hirayama S, Nemoto T, Sato N, Nakajima M, Nakao K, Mochizuki H, Gouda H, Hirono S, Fujii H. Investigation of Beckett–Casy model 3: Synthesis of novel naltrexone derivatives with contracted and expanded D-rings and their pharmacology. Bioorg Med Chem Lett 2010; 20:3801-4. [DOI: 10.1016/j.bmcl.2010.04.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 04/05/2010] [Accepted: 04/12/2010] [Indexed: 10/19/2022]
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12
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Nagase H, Imaide S, Tomatsu M, Nemoto T, Nakajima M, Nakao K, Mochizuki H, Fujii H. Investigation of Beckett–Casy model 2: Synthesis of novel 15–16 nornaltrexone derivatives and their pharmacology. Bioorg Med Chem Lett 2010; 20:3726-9. [DOI: 10.1016/j.bmcl.2010.04.080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 03/25/2010] [Accepted: 04/17/2010] [Indexed: 11/29/2022]
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13
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Fujii H, Imaide S, Watanabe A, Yoza K, Nakajima M, Nakao K, Mochizuki H, Sato N, Nemoto T, Nagase H. A Double Decarboxylation Reaction of an Oxazolidinone and Carboxylic Acid: Its Application to the Synthesis of a New Opioid Lead Compound. J Org Chem 2010; 75:995-8. [DOI: 10.1021/jo9025463] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hideaki Fujii
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Satomi Imaide
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Akio Watanabe
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Kenji Yoza
- Advanced X-ray Solutions, BRUKER AXS K.K., 3-9-A, Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa 211-0022, Japan
| | - Mayumi Nakajima
- Pharmaceutical Research Laboratories, Toray Industries, Inc., 6-10-1, Tebiro, Kamakura, Kanagawa 248-8555, Japan
| | - Kaoru Nakao
- Pharmaceutical Research Laboratories, Toray Industries, Inc., 6-10-1, Tebiro, Kamakura, Kanagawa 248-8555, Japan
| | - Hidenori Mochizuki
- Pharmaceutical Research Laboratories, Toray Industries, Inc., 6-10-1, Tebiro, Kamakura, Kanagawa 248-8555, Japan
| | - Noriko Sato
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Toru Nemoto
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
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15
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Nagase H, Watanabe A, Nemoto T, Yamaotsu N, Hayashida K, Nakajima M, Hasebe K, Nakao K, Mochizuki H, Hirono S, Fujii H. Drug design and synthesis of a novel kappa opioid receptor agonist with an oxabicyclo[2.2.2]octane skeleton and its pharmacology. Bioorg Med Chem Lett 2009; 20:121-4. [PMID: 19962305 DOI: 10.1016/j.bmcl.2009.11.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Revised: 11/04/2009] [Accepted: 11/06/2009] [Indexed: 11/24/2022]
Abstract
A conformational analysis of kappa opioid receptor agonists, TRK-820 and U-50,488H indicated an active conformation of TRK-820 in which the C-ring was in the boat form with the 14-OH interacting with the amide nitrogen. Based on the obtained active conformation of TRK-820, we designed and synthesized a novel kappa agonist KNT-63 with oxabicyclo[2.2.2]octane skeleton. KNT-63 showed profound antinociceptive effects via the kappa receptor which were as potent as that of TRK-820.
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Affiliation(s)
- Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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Nagase H, Osa Y, Nemoto T, Fujii H, Imai M, Nakamura T, Kanemasa T, Kato A, Gouda H, Hirono S. Design and synthesis of novel delta opioid receptor agonists and their pharmacologies. Bioorg Med Chem Lett 2009; 19:2792-5. [DOI: 10.1016/j.bmcl.2009.03.099] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 03/14/2009] [Accepted: 03/23/2009] [Indexed: 10/21/2022]
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17
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Watanabe A, Fujii H, Nakajima M, Hasebe K, Mochizuki H, Nagase H. Synthesis of a new opioid ligand having the oxabicyclo[3.2.1]octane skeleton using a new rearrangement reaction. Bioorg Med Chem Lett 2009; 19:2416-9. [DOI: 10.1016/j.bmcl.2009.03.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 03/10/2009] [Accepted: 03/18/2009] [Indexed: 10/21/2022]
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18
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Nagase H, Yamamoto N, Nemoto T, Yoza K, Kamiya K, Hirono S, Momen S, Izumimoto N, Hasebe K, Mochizuki H, Fujii H. Synthesis of a stable iminium salt and propellane derivatives. J Org Chem 2008; 73:8093-6. [PMID: 18811203 DOI: 10.1021/jo801276z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The treatment of morphinan 1 with NaH and MsCl provided very stable iminium salt 7 possessing propellane skeleton. One of the synthesized iminium salts 7, isobutyl derivative 7b, was crystallized and its structure was determined by X-ray crystallography. The natural bond orbital analysis suggested that the stability of the iminium should result from the stereoelectronic effect (hyperconjugation) attributed to their own structures.
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Affiliation(s)
- Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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Fujii H, Osa Y, Ishihara M, Hanamura S, Nemoto T, Nakajima M, Hasebe K, Mochizuki H, Nagase H. Synthesis of N-isobutylnoroxymorphone from naltrexone by a selective cyclopropane ring opening reaction. Bioorg Med Chem Lett 2008; 18:4978-81. [DOI: 10.1016/j.bmcl.2008.08.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 08/05/2008] [Accepted: 08/08/2008] [Indexed: 10/21/2022]
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Nemoto T, Fujii H, Narita M, Miyoshi K, Nakamura A, Suzuki T, Nagase H. Syntheses of 4,6′-epoxymorphinan derivatives and their pharmacologies. Bioorg Med Chem 2008; 16:4304-12. [DOI: 10.1016/j.bmc.2008.02.082] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 02/25/2008] [Accepted: 02/25/2008] [Indexed: 10/22/2022]
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