(7,7'-Bi-4aH-xanthene)-4a,4'a-dicarboxylic acid, 2,2',3,3,'4,4',9,9'-octahydro-1,1',4,4',8,8'-hexahydroxy-3,3'-dimethyl-9,9'-dioxo-, dimethyl ester, (3R-(3-alpha,4-beta,4-alpha,beta,7(3'R*,4'S*,4'aS*)))- 35287-72-0 Entothein Ergochrome AA(2,2') Secalonic acid A