(R)-2-(3,4-Dimethyl-pent-3-enyl)-2-methoxymethyl-malonic acid mono-(2-trimethylsilanyl-ethyl) ester

(S)-2-fluorocarbonyl-2-methoxymethyl-5,6-dimethylhept-5-enoic acid 2-trimethylsilylethyl ester

(R)-4-(2-bromo-5-methoxycarbonylphenyl)-2-(3,4-dimethylpent-3-enyl)-2-methoxymethyl-3-oxopentanedioic acid 5-methyl ester 1-(2-trimethylsilylethyl) ester