1-(3-Pyridylcarbonyl)-5-(4-chlorophenyl)-2-pyrazoline 121306-68-1 1H-Pyrazole, 4,5-dihydro-5-(4-chlorophenyl)-1-(3-pyridinylcarbonyl)- 5-(4-Chlorophenyl)-1-(3-pyridinylcarbonyl)-4,5-dihydro-1H-pyrazole