(12R,13S)-(+)-12-methyl-10-oxo-13-tetradecanolide

1-((3a'S,4'S,7'R,7a'S)-7'-((tert-butyldimethylsilyl)oxy)-7'-((4R,5S,E)-5-((tert-butyldimethylsilyl)oxy)-4-methylhex-2-en-1-yl)tetrahydro-4'H-spiro[cyclohexane-1,2'-[1,3]dioxolo[4,5-c]pyran]-4'-yl)propan-2-one