15-oxabicyclo[12.1.0]pentadeca-4,6,10-triene-7-acetic acid, alpha,4,10,14-tetramethyl-, methyl ester, (4E,6E,10E)- InChI=1/C21H32O3/c1-15-7-6-14-21(4)19(24-21)13-10-16(2)9-12-18(11-8-15)17(3)20(22)23-5/h7,9,12,17,19H,6,8,10-11,13-14H2,1-5H3/b15-7+,16-9+,18-12 methyl 2-[(4E,6E,10E)-4,10,14-trimethyl-15-oxabicyclo[12.1.0]pentadeca-4,6,10-trien-7-yl]propanoate