(3S,4R)-3,4-O-isopropylidene-3-methyl-5-(1,3-benzodioxol-5-yl)pentan-5-one-1-al dimethyl acetal

(E)-3-Benzo[1,3]dioxol-5-yl-3-[(4R,5S)-2,2,5-trimethyl-5-(2-oxo-ethyl)-[1,3]dioxolan-4-yl]-acrylic acid ethyl ester

(2E,4R,5S)-3-(1,3-benzodioxole-5-yl)-7,7-dimethoxy-4,5-O-isopropylidene-5-methyl-2-heptenoate