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 GLAUCARUBINONE NSC277286 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)]-