(6aS,7aR,8aR,9S,9aR)-9-((tert-butyldimethylsilyl)oxy)-4-hydroxy-6-(4-methoxybenzyl)-6a,7,7a,8a,9,9a-hexahydro-[1,3]dioxolo[4,5-j]oxireno[2,3-b]phenanthridin-5(6H)-one

(3aS,3bR,12S,12aR)-4-(4-methoxybenzyl)-2,2-dimethyl-5-oxo-3a,3b,4,5,12,12a-hexahydrobis([1,3]dioxolo)[4,5-c:4',5'-j]phenanthridine-6,12-diyl diacetate

4-(1-Ethoxy-ethoxy)-benzo[1,3]dioxole-5-carboxylic acid [(1R,5S,6R)-5-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-3-en-3-yl]-(4-methoxy-benzyl)-amide

Acetic acid (3aS,3bR,10bR,11S,12S,12aS)-6-acetoxy-11-hydroxy-4-(4-methoxy-benzyl)-2,2-dimethyl-5-oxo-3a,3b,4,5,10b,11,12,12a-octahydro-1,3,7,9-tetraoxa-4-aza-dicyclopenta[a,h]phenanthren-12-yl ester

Acetic acid (1S,2R,4aS,11bR)-7-acetoxy-1-(tert-butyl-dimethyl-silanyloxy)-5-(4-methoxy-benzyl)-6-oxo-1,2,4a,5,6,11b-hexahydro-[1,3]dioxolo[4,5-j]phenanthridin-2-yl ester