In previous phytochemical
studies, several aporphine alkaloids 2-4 and annonaceous
acetogenins 1,5 had been identified from this species. Among
these, 7-dehydroaporphine alkaloids exhibited significant
antiplatelet aggregation activity.3,4,6 In this paper, we
report herein three new alkaloids, promucosine (1), romucosine
F (2), and romucosine G (3), along with 28 known
compounds.