33529-61-2

This low-melting crystalline base is the major alkaloid of Poranthera coryrnbosa. Unlike the accompanying bases in the alkaloidal extract, it is dextrorotatory with [exlD + 29° (c 0.35, CHC13). It possesses a tetracyclic structure and contains only a methyl group as a substituent.

Denne et al., Tetrahedron Lett., 3107 (1971)