Synonyms: (3R,3'R,4'S,4'aS)-2,2',3,3',4,4',9,9'-Octahydro-1,1',4α,4',8,8'-hexahydroxy-3β,3'-dimethyl-9,9'-dioxo-7,7'-bi[4aH-xanthene]-4aα,4a'-dicarboxylic acid dimethyl ester;(3R,3'R,4S,4'S,4aS,4'aS)-2,2',3,3',4,4',9,9'-Octahydro-1,1',4,4',8,8'-hexahydroxy-3,3'-dimethyl-9,9'-dioxo-7,7'-bi(4aH-xanthene)-4a,4'a-dicarboxylic acid dimethyl ester;Entothein;Ergochrome AA;Ergochrome AA(2,2');Secalonic acid A