methyl (R)-4-((2S,4S,6S)-4-acetoxy-6-(((2S,6R,Z)-4-(bromomethylene)-6-formyltetrahydro-2H-pyran-2-yl)methyl)-6-methoxy-5,5-dimethyltetrahydro-2H-pyran-2-yl)-3-((tert-butyldiphenylsilyl)oxy)butanoate

4-[4-acetoxy-6-(4-bromomethylene-6-vinyl-tetrahydro-pyran-2-ylmethyl)-6-methoxy-5,5-dimethyl-tetrahydro-pyran-2-yl]-3-hydroxy-butyric acid methyl ester

4-[4-acetoxy-6-(4-bromomethylene-6-vinyl-tetrahydro-pyran-2-ylmethyl)-6-methoxy-5,5-dimethyl-tetrahydro-pyran-2-yl]-3-hydroxy-butyric acid

E-7-(tert-butyl-dimethyl-silanyloxy)-3-[2-hydroxy-3-(2,2,5-trimethyl-[1,3]dioxolan-4-yl)-propyl]-6,6-dimethyl-hept-2-en-4-ynoic acid methyl ester