1-Phenyl-3-methyl-4-[2-(1,3,3-trimethylindoline-2-ylidene)ethylidene]-2-pyrazoline-5-one

4-[(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one

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