(8,8'-Bi-1H-naphtho(2,3-c)pyran)-3,3'-diacetic acid, 3,3',4,4',5,5',10,10'-octahydro-6,6',9,9'-tetrahydroxy-1,1'-dimethyl-5,5',10,10'-tetraoxo-, (1R,1'R,3S,3'S)- 1397-77-9 15428-92-9 Actinorhodin Actinorhodine