(2S,5R)-2-tert-Butyl-5-{(2S,6S,8S)-8-[(R)-2-(4-methoxy-benzyloxy)-1-methyl-ethyl]-10-methyl-1,7-dioxa-spiro[5.5]undec-10-en-2-ylmethyl}-5-methyl-[1,3]dioxolan-4-one

(2S,5S)-2-tert-Butyl-5-(hydroxy-{(2S,6R,8S)-8-[(R)-2-(4-methoxy-benzyloxy)-1-methyl-ethyl]-10-methyl-1,7-dioxa-spiro[5.5]undec-10-en-2-yl}-methyl)-5-methyl-[1,3]dioxolan-4-one

tert-Butyl-{(2S,6R,8S)-8-[(R)-2-(4-methoxy-benzyloxy)-1-methyl-ethyl]-10-methyl-1,7-dioxa-spiro[5.5]undec-10-en-2-ylmethoxy}-diphenyl-silane

(2S,10S,11R)-1-(tert-Butyl-diphenyl-silanyloxy)-2-hydroxy-12-(4-methoxy-benzyloxy)-11-methyl-10-trimethylsilanyloxy-dodec-7-yn-6-one

(E)-(2S,10S,11R)-1-(tert-Butyl-diphenyl-silanyloxy)-12-(4-methoxy-benzyloxy)-8,11-dimethyl-2,10-bis-trimethylsilanyloxy-dodec-7-en-6-one