1-Phenyl-2-aethyl-3-methyl-4-isoamyl-5-pyrazolon [German] 2-Ethyl-4-isopentyl-3-methyl-1-phenyl-3-pyrazolin-5-one 3-Pyrazolin-5-one, 2-ethyl-4-isopentyl-3-methyl-1-phenyl- UQ9291000