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[文献書誌] H.Takayama: "Biomimetic Synthesis of Koumine by the PalladiumーCatalyzed Intramolecular Coupling Reaction of 18ーHydroxytaberpsychine." Heterocycles. 30. 325-327 (1990)
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[文献書誌] H.Takayama: "Synthetic Studies on Gelsedine AlkaloidsーI: Stereoselective Preparation of Hypothetical Biogenetic Intermediates,DーNorsarpagine Type Compounds from Ajmaline." Tetrahedron Letters. 31. 1287-1290 (1990)
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[文献書誌] H.Takayama: "Synthetic Studies on Gelsedine AlkaloidsーII: First Construction of Gelsedine Skeleton (N_aーDesmethoxygelseーmicine) from Gardnerine Based on the Alternative Biogenetic Speculation." Tetrahedron Letters. 31. 5483-5486 (1990)
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[文献書誌] 高山 廣光: "ゲルセミウム属アルカロイドの合成研究" 有機合成化学協会誌. 48. 876-890 (1990)
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[文献書誌] H.Takayama: "An Efficient Synthetic Pathway to the MacrolinーType Indole alkaloids,Talcarpine and Alstonerine from Ajmaline." Tetrahedron. 47. 1383-1392 (1991)
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[文献書誌] M.Kitajima: "The Stereoselective Transformation of Ajmaline into Three Minor Gelsemium Alkaloids,Koumidine,19ZーAnhydrovobasinediol,and NーDesmethoxyrankinidine and Their Absolute Configuration."