(2R,3R)-2,3-<(R)-(4-methoxybenzylidene)dioxy>-2-methylpentanal

(1S,2R,3R,4R,6R)-6-Benzyloxy-1-[(2R,4S,5R)-5-ethyl-2-(4-methoxy-phenyl)-4-methyl-[1,3]dioxolan-4-yl]-2,4-dimethyl-6-[(4R,5S,6R)-2,2,5-trimethyl-6-((S)-1-methyl-allyl)-[1,3]dioxan-4-yl]-heptane-1,3-diol