(1R,4S,5aS,6R,7S,8aR,12R)-4-hydroxy-1,6,12-trimethyl-10-oxohexahydro-6H-8a,5a-(epoxyethano)-1,4-methanocyclopenta[d]oxepin-7-yl rel-butanoate 2-O-n-Butyrylpseudomajucin InChI=1/C19H28O6/c1-5-6-14(20)24-13-7-19-16(4)10-23-18(22,12(16)3)9-17(19,11(13)2)8-15(21)25-19/h11-13,22H,5-10H2,1-4H3/t11-,12+,13-,16-,17+,18-,19-/m1/s butanoic acid, (3aR,5R,8S,8aS,10R,11S,12S)-hexahydro-5-hydroxy-8,11,12-trimethyl-2-oxo-5,8-methano-3a,8a-propanofuro[2,3-d]oxepin-10-yl ester