Synonyms: Butyricacid, 2-hydroxy-2-methyl-, 4-ester with 1,3ab,4,7,7aa,11,11a,11ba-octahydro-1a,2a,4b,11b-tetrahydroxy-3a,8,11ab-trimethyl-2H-1,11cb-(epoxymethano)phenanthro[10,1-bc]pyran-5,10(3H,6abH)-dione (8CI); Glaucarubinone(7CI); Picras-3-ene-2,16-dione, 11,20-epoxy-1,11,12-trihydroxy-15-(2-hydroxy-2-methyl-1-oxobutoxy)-,[1b,11b,12a,15b(S)]-;2H-1,11c-(Epoxymethano)phenanthro[10,1-bc]pyran, picras-3-ene-2,16-dionederiv.; (+)-Glaucarubinone; NSC 132791; NSC 277286