allyl ((1R,2S)-1-((7S,11R)-5-(allyloxy)-8-hydroxy-4-methyl-7,8,10,11-tetrahydro-6H-7,11-epimino[1,3]dioxolo[4',5':5,6]benzo[1,2-d]oxocin-12-yl)-1-cyano-3-(3,5-dihydroxy-4-methoxyphenyl)propan-2-yl)carbamate

benzyl (7S,11R)-5-(benzyloxy)-4-methyl-8-oxo-7,8,10,11-tetrahydro-6H-7,11-epimino[1,3]dioxolo[4',5':5,6]benzo[1,2-d]oxocine-12-carboxylate

(S)-2-Benzyloxycarbonylamino-3-(6-benzyloxy-7-methyl-benzo[1,3]dioxol-5-yl)-propionic acid 2-oxo-ethyl ester

(S)-2-Benzyloxycarbonylamino-3-(6-benzyloxy-7-methyl-benzo[1,3]dioxol-5-yl)-propionic acid 2,2-dimethoxy-ethyl ester