A new 4,5-dioxoaporphine alkaloid, 8-methoxyouregidione, along with ar
tabotrine, ouregidione, liriodenine, oxocrebanine, oxobuxifoline, athe
rospermidine and lanuginosine have been isolated from Artabotrys zeyla
nicus. Investigation of Xylopia championii afforded O-methylmoschatoli
ne and dicentrinone.