(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, [3S-[3-.alpha.,4-.beta.,4a-.beta.,7(3'r,4'S,4'As)]] (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, [3S-[3.alpha.,4.beta.,4a.beta.,7(3'r*,4's*,4'as*)]]- 35287-69-5 Ergochrome AA (2,2')-5-.beta.,6-.alpha.,10-.beta.-5',6'-.alpha.,10'-.beta. NSC268922 SAD SECALONSAURE D Secalonic acid D [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, [3S-[3.alpha.,4.beta.,4a.beta.,7(3'R*,4'S*,4'aS*)]]-