6-[(2,4-二氨基苯基)偶氮]-3-[[4-[[4-[[7-[(2,4-二氨基苯基)偶氮]-1-羟基-3-磺基-2-萘基]偶氮]苯基]氨基]-3-磺基苯基]偶氮]-4-羟基萘-2-磺基酸, 盐锂钠
74037-81-3