25514-30-1 2H-3,11c.beta.-(Epoxymethano)phenanthro[10,1-bc]pyran-3.alpha.(1H)-carboxylic acid, 3a,4,5,6a.beta.,7,7a.alpha.,10,11,11a,11b.alpha.-decahydro-1.beta.,2.alpha.,4.beta.,9-tetrahydroxy-8,11a.beta.-dimethyl-5,10-dioxo-, methyl ester, 4-(4-hydroxy-3,4-dimethyl-2-pentenoate) BRUCEIN C Bruceine C NSC305730 Picras-3-en-21-oic acid, 13,20-epoxy-3,11,12-trihydroxy-15-[(4-hydroxy-3,4-dimethyl-1-oxo-2-pentenyl)oxy]-2,16-dioxo-, methyl ester, [11.beta.,12.alpha.,15.beta.(E)]-