2-{9-[9-(2-(tert-butyl-dimethyl-silanyloxy)-3-{9-[4-(4-methoxy-benzyloxy)-3,5-dimethyl-hex-1-enyl]-6,10-dioxa-spiro[4.5]dec-7-yl}-propyl)-6,10-dioxa-spiro[4.5]dec-7-ylmethyl]-6,10-dioxa-spiro[4.5]dec-7-yl}-propionaldehyde

2-{9-[(9-{3-[9-((1E)(3S,4S)-4-hydroxy-3,5-dimethylhex-1-enyl)(7S,9R)-6,10-dioxaspiro[4.5]dec-7-yl](2S)-2-(tert-butyldimethylsilyloxy)propyl}(7R,9R)-6,10-dioxaspiro[4.5]dec-7-yl)methyl](9S,7R)-6,10-dioxaspiro[4.5]dec-7-yl}(2R)propanal