107646-95-7 2(1H)-Pyrimidinone, 5-chloro- 5-Chloro-1H-pyrimidin-2-one 5-Chloro-2(1H)-pyrimidinone 5-Chloro-2-hydroxypyrimidine 5-Chloropyrimidin-2-one 54326-16-8 EINECS 259-106-2 NY 3000