101940-13-0 EINECS 309-999-0 Thiocyanic acid, (1,3,8,10-tetrahydro-1,3,8,10-tetraoxoanthra(2,1,9-def:6,5,10-d'e'f')diisoquinoline-2,9-diyl)di-3,1-phenylene ester, reaction products with sodium sulfide (Na2(Sx)), leuco deriv.