ethyl [2R,2(1R,2S),3S,4R]-5-benzyloxy-2-[3-benzyloxy-1,2-(diethylmethylenedioxy)propyl]-3,4-(dimethylmethylenedioxy)-2-hydroxy-3-(methoxycarbonyl)pentanoate

(R,E)-4-(benzyloxy)methyl-5-[methylthio(trimethylsilyloxy)methylene]-2,2-dimethyl-1,3-dioxolane

(R,Z)-4-(benzyloxy)methyl-5-[methylthio(trimethylsilyloxy)methylene]-2,2-dimethyl-1,3-dioxolane

ethyl [2S,2(1R,2S),3S,4R]-5-benzyloxy-2-[3-benzyloxy-1,2-(diethylmethylenedioxy)propyl]-3,4-(dimethylmethylenedioxy)-2-hydroxy-3-(methylthio)carbonylpentanoate