Thermoplast Yellow 104

Solvent yellow 93 (C.I. 48160)

4-(4,5-Dihydro-1-phenyl-3-methyl-5-oxo-1H-pyrazole-4-ylidenemethyl)-1-phenyl-3-methyl-1H-pyrazole-5(4H)-one

4-[(1,5-Dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)methyl]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one