C.I.21210

C.I.Pigment Red 42

diethyl 4,4'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate]

Diethyl 4,4'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3- carboxylate)

4,4'-[(3,3'-Dimethoxy-1,1'-biphenyl-4,4'-diyl)bis(azo)]bis[4,5-dihydro-1-phenyl-5-oxo-1H-pyrazole-3-carboxylic acid ethyl] ester

4,4'-[(3,3'-Dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid ethyl] ester