Acetic acid (3S,4aR,6aR,6bS,8aS,11S,14aR,14bS)-11-amino-4,4,6a,6b,8a,11,14b-heptamethyl-14-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,14,14a,14b-octadecahydro-picen-3-yl ester

N-[(3β,18β,20β)-3-(acetoxy)-11-oxo-30-norolean-12-en-20-yl]-1,2-hydrazinedicarboxamide

N-[(3β,18β,20β)-3-(hydroxyimino)-11-oxo-30-norolean-12-en-20-yl]urea

N-[(3β,18β,20β)-3-[(ethoxycarbonylamino)thioxomethoxy]-11-oxo-30-norolean-12-en-20-yl]urea