1-Propargyl-5-chloropyrimidin-2-one 2(1H)-Pyrimidinone, 5-chloro-1-(2-propynyl)- 5-24-02-00066 (Beilstein Handbook Reference) 5-Chloro-1-(2-propynyl)-2(1H)-pyrimidinone 63331-26-0 BRN 0639922 NY 3170