2-Naphthalenecarboxamide, 4-((2-(aminocarbonyl)-5-methoxyphenyl)azo)-3-hydroxy-N-(4-methoxyphenyl)- 4-((6-(Aminocarbonyl)-3-methoxyphenyl)azo)-3-hydroxy-N-(4-methoxyphenyl)-2-naphthalenecarboxamide 70321-82-3