Two New Indole Alkaloids from Tabernaemontana hystrix Steud. (Apocynaceae) |
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| Authors: | Jucimar J. de Souza Leda Mathias Raimundo Braz‐Filho Ivo J. Curcino Vieira |
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| Affiliation: | 1. Setor de Química de Produtos Naturais, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013‐602, Campos dos Goytacazes, Rio de Janeiro, Brazil, (phone: +55‐22‐27397046;2. fax: +55‐22‐27397248);3. Pesquisador Visitante Emérito‐FAPERJ/UENF/UFRRJ |
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| Abstract: | Two new monoterpene indole alkaloids named ibogamine‐7,8‐dione ( 1 ) and 12‐methoxyvoachalotine ( 2 ), and eight known ones, coronaridine ( 3 ), coronaridine hydroxyindolenine ( 4 ), 5‐oxocoronaridine ( 5 ), 3‐oxocoronaridine hydroxyindolenine ( 6 ), 3‐oxocoronaridine ( 7 ), vobasine ( 8 ), ibogamine ( 9 ), and olivacine ( 10 ), were isolated from a CH2Cl2 extract of the root bark from Tabernaemontana hystrix. The structures of the compounds were elucidated on the basis of spectroscopic data analyses, mainly 1H‐ and 13C‐NMR, including 2D experiments (1H,1H‐COSY, HMBC, and HMQC). |
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| Keywords: | Tabernaemontana hystrix Indole alkaloids Monoterpene indole alkaloids Alkaloids |
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