Synonyms: Isovalericacid, 4-ester with 1,2,3,3ab,4,6ab,7,7aa,10,11,11a,11ba-dodecahydro-1a,2a,4b,10a,11b-pentahydroxy-3a,8,11ab-trimethyl-5H-1,11cb-(epoxymethano)phenanthro[10,1-bc]pyran-5-one(8CI); 5H-1,11c-(Epoxymethano)phenanthro[10,1-bc]pyran, picras-3-en-16-onederiv.; 5H-1,11cb-(Epoxymethano)phenanthro[10,1-bc]pyran-5-one,1,2,3,3ab,4,6ab,7,7aa,10,11,11a,11ba-dodecahydro-1a,2a,4b,10a,11b-pentahydroxy-3a,8,11ab-trimethyl-, 4-isovalerate (8CI); Glaucarubol15-isovalerate