(3alpha,5beta,9beta,10alpha,15alpha,16beta)-3-hydroxy-15,16-epoxykauran-2-one 9,11,15-octadecatrienoic acid, 13-hydroxy-, (9Z,11E,13R,15Z)- InChI=1/C20H30O3/c1-17(2)13-7-8-20-9-11(19(4)16(20)23-19)5-6-14(20)18(13,3)10-12(21)15(17)22/h11,13-16,22H,5-10H2,1-4H3/t11?,13-,14+,15-,16+,18-,19+,20?/m1/s ent-15,16-Epoxy-3- -hydroxy-kauran-2-one