3H-Pyrazol-3-one, 4-((2,4-dimethoxyphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl- 4-((2,4-Dimethoxyphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one 61550-72-9 EINECS 262-838-5