pilatin

(E)-2-Hexenoic acid [[(3S)-5a,7,8,8aβ-tetrahydro-4-formyl-3α,5aβ-dihydroxy-7,7-dimethyl-1-oxo-3H,6H-3aβ,8bβ-methano-1H-indeno[4,5-c]furan]-6α-yl] ester