1259-86-5 Butyric acid, 2-hydroxy-2-methyl-, 4-ester with 1,3a.beta.,4,7,7a.alpha.,11,11a,11b.alpha.-octahydro-1.alpha.,2.alpha.,4.beta.,11.beta.-tetrahydroxy-3.alpha.,8,11a.beta.-trimethyl-2H-1,11c.beta.-(epoxymethano)phenanthro[10,1-bc]pyran-5,10(3H,6a.beta.H)-dione Butyric acid, 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 GLAUCARUBINONE NSC 277286 NSC132791 Picras-3-ene-2,16-dione, 11,20-epoxy-1,11,12-trihydroxy-15-(2-hydroxy-2-methyl-1-oxobutoxy)-, [1.beta.,11.beta.,12.alpha.,15.beta.(S)]-