“…Eburnamine derivative dimeric alkaloids ( Figure 14 (224) with an eburnamine-quebrachamine derivatives, were isolated from eight Melodinus species by column chromatography (CC),TLC, RP-18 gel, Sephadex LH-20 [6,14,21,27,42,43,45,65,[68][69][70][71].The absolute configuration of 220 and 221 was determined using ECD exciton chirality method. M. insulaepinorum furnished an eburnamine-kopsinine bisalkaloid, insulopinine (225) [24].…”