Synonyms: AC1L4DER;AC1Q43U7;77702-23-9;PICRASAN-21-OIC ACID 13,20-EPOXY-3,11,12-TRIHYDROXY-15-(3-METHYL-1-OXOBUTOXY)-2,16-DIOXO-,METHYL ESTER,(11SS,12A,15SS)-;Picrasan-21-oic acid, 13,20-epoxy-3,11,12-trihydroxy-15-(3-methyl-1-oxobutoxy)-2,16-dioxo-, methyl ester, (11beta,12alpha,15beta)-