Four tetracyclic oxindole alkaloids and a taberpsychine derivative from a Malayan Tabernaemontana.
作者： Kuan-Hon Lim , Kooi-Mow Sim , Guan-Huat Tan , Toh-Seok Kam
DOI: 10.1016/J.PHYTOCHEM.2009.06.010
关键词:
摘要: Four tetracyclic oxindole alkaloids, 7(R)- and 7(S)-geissoschizol (1 2), 7(R),16(R)- 7(S),16(R)–19(E)-isositsirikine (3 4), in addition to a taberpsychine derivative, N(4)-demethyltaberpsychine (5), were isolated from the Malayan Tabernaemontana corymbosa structures established using NMR MS analysis.
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