Neisosperma glomerata

A complex mixture of 10-methoxy-3,4,5,6-tetradehydro-18,19-dihydrocory-nantheol (17), 3,4,5,6-tetradehydroochropposinine (18), 10-methoxy-3,4,5,6-tetradehydrocorynantheol (19), and 3,4,5,6,18,19-hexadehydroochropposinine (20) has been isolated from the root bark of Neisosperma glomerata (Blume) Fosberg and Sachet (25). The approximative structure elucidation of alkaloids 17-20 was performed by H-NMR and mass spectral analysis of the unseparated mixture. 

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