(4S,5S)-4-[(1S,2R,3S,4S,6R)-1-Benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-3-(2,2-dimethoxy-ethyl)-3-methyl-7-oxa-bicyclo[4.2.0]oct-2-yl]-6,6,8-trimethyl-1,3-dioxa-spiro[4.5]dec-8-ene-2,7-dione

(4S,5S)-4-[(1S,2R,3S,4S,6R)-1-Benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-3-(2,2-dimethoxy-ethyl)-3-methyl-7-oxa-bicyclo[4.2.0]oct-2-yl]-6,6,8-trimethyl-1,3-dioxa-spiro[4.5]decane-2,7-dione

(1aS,3aS,4S,5aR,7aS,7bR,8S,9S,11aR)-7a-acetoxy-9-hydroxy-3a,11a,12,12-tetramethyl-2-oxo-4-((triethylsilyl)oxy)tetradecahydro-1a,9-methanooxireno[2'',3'':5',6']cyclodeca[1',2':3,4]benzo[1,2-b]oxet-8-yl benzoate

Trifluoro-methanesulfonic acid (4S,5S)-4-[(1S,2R,3S,4S,6R)-1-benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-3-(2,2-dimethoxy-ethyl)-3-methyl-7-oxa-bicyclo[4.2.0]oct-2-yl]-6,6,8-trimethyl-2-oxo-1,3-dioxa-spiro[4.5]dec-7-en-7-yl ester

(2aR,4S,4aS,6R,11S,12S,12aR,12bS)-12b-acetoxy-6,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-4-((triethylsilyl)oxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate