1H-Benz(de)isoquinoline-1,3(2H)-dione, 6-hydroxy-5-((2-methoxy-4-nitrophenyl)azo)-2-methyl- 4-Hydroxy-3-(2-methoxy-4-nitrophenylazo)-N-methyl-1,8-naphthalenedicarboximide 42357-98-2 6-Hydroxy-5-((2-methoxy-4-nitrophenyl)azo)-2-methyl-1H-benz(de)isoquinoline-1,3(2H)-dione EINECS 255-770-2