Bioassay-guided fractionation of the fruit powder of Graviola (Annona muricata) was
continued to be conducted and yielded three more novel bioactive compounds: C35
annonaceous acetogenins, muricins M and N, and C37
annonaceous acetogenins,
muricenin. They all contain a monotetrahydrofuran
ring and four hydroxyl groups. The
structures were eluci
dated by spectral methods and chemical modification after isolation
via open column chromatographic separation and HPLC purification. Especially, murices
M and N demonstrated more potent antiproliferative
activities against human prostate
cancer PC-3 cells.