methyl (Z)-6-((4S,5S)-5-formyl-2,2-dimethyl-1,3-dioxolan-4-yl)hex-4-enoate

methyl (Z)-6-((4S,5R)-2,2-dimethyl-5-((1E,3E)-6-(trimethylsilyl)hexa-1,3-dien-5-yn-1-yl)-1,3-dioxolan-4-yl)hex-4-enoate