6,7,12,19,20,25-Hexahydro-N,N-dimethyl-5,7,12,20,25-pentaoxo-5H-anthra(2,1,9-mna)naphth(2'',3'':6',7')indolo(2',3':5,6)naphth(2,3-h)acridine-18-sulphonamide 83721-64-6 EINECS 280-591-1