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[摘要]:Three new C19-diterpenoid alkaloids, named aconitramines A (1), B (2), and C (3), were isolated from Aconitum transsectum. By UV, IR, 1D- and 2D-NMR, and MS analyses, their structures were elucidated as 18-methoxyvilmoraconitine, 18-demethoxydolichotine A, and 18-demethoxydolichotine B. Compound 1 is the second known C19-diterpenoid alkaloid with a three-membered ring formed by C(8), C(9), and C(10). |
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