(5beta,8alpha,9beta,10alpha,15alpha,16beta)-15,16-epoxykauran-18-oic acid 4H-1-benzopyran-4-one, 2-[3,4-dihydroxy-5-[(2E)-7-hydroxy-3,7-dimethyl-2-octenyl]phenyl]-2,3-dihydro-5,7-dihydroxy-, (2S)- InChI=1/C20H30O3/c1-17-8-4-9-18(2,16(21)22)13(17)7-10-20-11-12(5-6-14(17)20)19(3)15(20)23-19/h12-15H,4-11H2,1-3H3,(H,21,22)/t12?,13-,14-,15-,17+,18+,19-,20+/m0/s ent-15beta,16beta-Epoxykauran-19-oic acid