(2R,4S,6R,8R,10S)-2-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-methoxy-10-(4-methoxy-benzyloxy)-8-triisopropylsilanyloxymethyl-1,7-dioxa-spiro[5.5]undecane

(R)-8-(tert-Butyl-dimethyl-silanyloxy)-2-hydroxy-6-(4-methoxy-benzyloxy)-1-((2R,4R,6R)-2-phenyl-6-triisopropylsilanyloxymethyl-[1,3]dioxan-4-yl)-octan-4-one

(Z)-(R)-8-(tert-Butyl-dimethyl-silanyloxy)-4-hydroxy-6-(4-methoxy-benzyloxy)-1-((2R,4S,6R)-2-phenyl-6-triisopropylsilanyloxymethyl-[1,3]dioxan-4-yl)-oct-3-en-2-one

(2S,4S,6R,8S,10S)-10-(tert-Butyl-dimethyl-silanyloxy)-2,8-bis-(2-hydroxy-ethyl)-4-methyl-1,7-dioxa-spiro[5.5]undecan-4-ol

[(2R,4S,6S,8R,10S)-4-(tert-Butyl-dimethyl-silanyloxy)-10-hydroxy-10-methyl-8-(2-oxo-ethyl)-1,7-dioxa-spiro[5.5]undec-2-yl]-acetic acid tert-butyl ester