(1R,2S,3S,4S,4aR,11bR)-1,2,3,4-tetrahydroxy-7-methoxy-1,3,4,4a,5,11b-hexahydro-2H-[1,3]dioxolo[4,5-j]phenanthridin-6-one

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]-amide

methyl 2-hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-4-carboxylate

(1S,4R,5S,6R)-4-azido-5,6-(isopropylidenedioxy)cyclohex-2-enyl methyl carbonate

(6aS,7aR,8aR,9R,9aR)-9-(benzyloxy)-4-methoxy-6-(4-methoxybenzyl)-6a,7,7a,8a,9,9a-hexahydro-[1,3]dioxolo[4,5-j]oxireno[2,3-b]phenanthridin-5(6H)-one

(6aS,7aR,8aR,9aR)-4-methoxy-6-(4-methoxybenzyl)-6a,7a,8a,9a-tetrahydro-[1,3]dioxolo[4,5-j]oxireno[2,3-b]phenanthridine-5,9(6H,7H)-dione

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

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

(6aS,7aR,8aR,9S,9aR)-9-((tert-butyldimethylsilyl)oxy)-4-methoxy-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,10bR,10cS,13aR,13bS)-6-methoxy-2,2-dimethyl-3b,4,10b,10c,13a,13b-hexahydro-[1,3,2]dioxathiolo[4,5-a]bis([1,3]dioxolo)[4,5-c:4',5'-j]phenanthridin-5(3aH)-one 12,12-dioxide

Benzoic acid (1R,2R,3S,4S,4aR,11bR)-2,3,4-trihydroxy-7-methoxy-6-oxo-1,2,3,4,4a,5,6,11b-octahydro-[1,3]dioxolo[4,5-j]phenanthridin-1-yl ester

(1R,2R,4aS,11bR)-1-Benzyloxy-2-hydroxy-7-methoxy-5-(4-methoxy-benzyl)-1,4a,5,11b-tetrahydro-2H-[1,3]dioxolo[4,5-j]phenanthridin-6-one

Carbonic acid (3aS,4R,7S,7aR)-7-methoxycarbonyloxy-2,2-dimethyl-3a,4,7,7a-tetrahydro-benzo[1,3]dioxol-4-yl ester methyl ester

(1R,2R,3S,4S,4aR,11bR)-1-benzyloxy-5-(4-methoxy-benzyl)-2,3,4-trihydroxy-7-methoxy-1,3,4,4a,5,11b-hexahydro-2H-[1,3]dioxolo[4,5-j]phenanthridin-6-one

(3aS,4R,5R,7aR)-4-Azido-7'-methoxy-2,2-dimethyl-3a,4,5,7a-tetrahydro-[5,5']bi[benzo[1,3]dioxolyl]

(3aS,4R,5R,6S,7S,7aR)-4-Azido-7'-methoxy-2,2-dimethyl-3a,4,5,6,7,7a-hexahydro-[5,5']bi[benzo[1,3]dioxolyl]-6,7-diol

(3aS,4R,5R,6S,7R,7aS)-4-Azido-7'-methoxy-2,2-dimethyl-6,7-bis-triethylsilanyloxy-3a,4,5,6,7,7a-hexahydro-[5,5']bi[benzo[1,3]dioxolyl]

tert-Butyl-((1R,2S,6R)-4-isocyanato-7-oxa-bicyclo[4.1.0]hept-3-en-2-yloxy)-dimethyl-silane

(3aS,4R,5R,6S,7R,7aS)-6'-Bromo-4-isocyanato-7'-methoxy-2,2-dimethyl-6,7-bis-triethylsilanyloxy-3a,4,5,6,7,7a-hexahydro-[5,5']bi[benzo[1,3]dioxolyl]