(±)-三尖杉碱

N-[2-[3,4-(methylenedioxy)phenyl]ethyl]-2,6-dioxo-1-azaspiro[4.4]non-7-ene

N-[2-[3,4-(methylenedioxy)phenyl]ethyl]-6α-hydroxy-2-oxo-1β-azaspiro[4.4]non-7-ene

(5S,6S)-1-(2-(benzo[d][1,3]dioxol-5-yl)ethyl)-2-oxo-1-azaspiro[4.4]non-7-en-6-yl acetate

2,3-dehydrocephalotaxan-8-one