3-Pyrazolin-5-one,4-ethyl-1-(1-methyl-4-piperidyl)-3-phenyl- (6CI,7CI,8CI); 1-(1-Methyl-4-piperidyl)-3-phenyl-4-ethyl-2-pyrazolin-5-one;4-Ethyl-1-(1-methyl-4-piperidyl)-3-phenyl-3-pyrazolin-5-one; PR 66; Piperylon;Piperylone
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