A colchicine type alkaloid, N-methylcolchamine occurs in Merendera robusta Bge. It is laevorotatory having a specific rotation of [α]D - 109° (CHC13). The structure has been established from spectroscopic data and by comparison with colchamine.
References
Salen et at., Collect. Czech. Chem. Commun., 28, 3413 (1963) Trudykulov, Yusupov, Sadykov, Khim. Prir. Soedin., (1972) Yusupov, Tr. Tashkent Nauch. Uzbek SSR, 20, 24 (1972)
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![(S)-7-(Dimethylamino)-6,7-dihydro-1,2,3,10-tetramethoxybenzo[a]heptalen-9(5H)-one Structure](/CAS/GIF/7336-44-9.gif)