1-(4-Pyridyl)-4,4-dimethylpent-1-en-3-one hydrochloride 1-Penten-3-one, 4,4-dimethyl-1-(4-pyridinyl)-, hydrochloride 4,4-Dimethyl-1-(4-pyridinyl)-1-penten-3-one hydrochloride 58344-37-9 D 648