1-(3-Pyridylcarbonyl)-5-methyl-2-pyrazoline 121306-58-9 1H-Pyrazole, 4,5-dihydro-5-methyl-1-(3-pyridinylcarbonyl)- 5-Methyl-1-(3-pyridinylcarbonyl)-4,5-dihydro-1H-pyrazole