(1aR,4E,6R,6aS,7R,9aR,10aS)-4,7,10a-trimethyl-8-oxo-1a,2,3,6,6a,7,8,9a,10,10a-decahydrooxireno[8,9]cyclodeca[1,2-b]furan-6,7-diyl rel-(2Z,2'Z)bis(2-methylbut-2-enoate) 2-Methyl-but-2-enoic acid 3,8-dimethyl-12-(2-methyl-but-2-enoyloxy)-13-oxo-4,14-dioxa-tricyclo[(9.3.0.0)^3,5]tetradec-8-en-10-yl ester 2-butenoic acid, 2-methyl-, (1aR,4E,6R,6aS,7R,9aR,10aS)-1a,2,3,6,6a,7,8,9a,10,10a-decahydro-4,7,10a-trimethyl-8-oxooxireno[8,9]cyclodeca[1,2-b]furan-6,7-diyl ester, (2Z,2'Z)- InChI=1/C25H34O7/c1-8-15(4)21(26)29-17-12-14(3)10-11-19-24(6,31-19)13-18-20(17)25(7,23(28)30-18)32-22(27)16(5)9-2/h8-9,12,17-20H,10-11,13H2,1-7H3/b14-12+,15-8-,16-9-/t17-,18?,19-,20-,24+,25-/m1/s Rouyolide A