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  • Title: Biscarpamontamines A and B, an aspidosperma-iboga bisindole alkaloid and an aspidosperma-aspidosperma bisindole alkaloid, from Tabernaemontana sphaerocarpa.
    Author: Zaima K, Hirata T, Hosoya T, Hirasawa Y, Koyama K, Rahman A, Kusumawati I, Zaini NC, Shiro M, Morita H.
    Journal: J Nat Prod; 2009 Sep; 72(9):1686-90. PubMed ID: 19711971.
    Abstract:
    Two new bisindole alkaloids, biscarpamontamine A (1), possessing an aspidosperma-iboga-type skeleton, and biscarpamontamine B (2), having an aspidosperma-aspidosperma-type skeleton, were isolated from stems of Tabernaemontana sphaerocarpa, and their structures were elucidated on the basis of spectroscopic data analysis. The absolute configuration of biscarpamontamine B (2) was established by comparison of its CD spectrum and with that of vobtusine (3). Biscarpamontamine B (2) showed potent cytotoxicity against various human cancer cell lines.
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