Succinic acid allyl ester (2S,3R,6S,8R,9S)-2-((1E,3E)-4-allyloxycarbonyl-3-methyl-buta-1,3-dienyl)-8-[(E)-4-(benzothiazol-2-ylsulfanyl)-3-methyl-but-2-enyl]-3-butyl-9-methyl-1,7-dioxa-spiro[5.5]undec-3-yl ester

(2S,3R,6R,8R,9S)-3-Butyl-2-(tert-butyl-diphenyl-silanyloxymethyl)-8-[2-(4-methoxy-benzyloxy)-ethyl]-9-methyl-1,7-dioxa-spiro[5.5]undecan-3-ol

Succinic acid allyl ester (2S,3R,6S,8R,9S)-2-((1E,3E)-4-allyloxycarbonyl-3-methyl-buta-1,3-dienyl)-3-butyl-9-methyl-8-((E)-3-methyl-4-oxo-but-2-enyl)-1,7-dioxa-spiro[5.5]undec-3-yl ester

(2R,3S)-2-(tert-Butyl-dimethyl-silanyloxy)-3-methyl-4-triethylsilanyloxy-butyraldehyde

Succinic acid allyl ester (2S,3R,6S,8R,9S)-2-((1E,3E)-4-allyloxycarbonyl-3-methyl-buta-1,3-dienyl)-8-[(E)-4-(benzothiazole-2-sulfonyl)-3-methyl-but-2-enyl]-3-butyl-9-methyl-1,7-dioxa-spiro[5.5]undec-3-yl ester