Laserolide

(Z)-2-Methyl-2-butenoic acid [(3S,3aR,4S,6E,10E,11aS)-4-acetoxy-2,3,3a,4,5,8,9,11a-octahydro-3,6,10-trimethyl-2-oxocyclodeca[b]furan-3-yl] ester