2-Chloro-6,7-dimethoxy-4(1H)-quinazolinone hydrazone hemihydrate 2-Chloro-6,7-dimethoxy-4-hydrazinoquinazoline hemihydrate 37562-23-5 4(1H)-Quinazolinone, 2-chloro-6,7-dimethoxy-, hydrazone, hemihydrate 4(3H)-Quinazolinone, 2-chloro-6,7-dimethoxy-, hydrazone, hemihydrate