3-(4-(Diethylamino)-2-butynyl)-7-methoxy-4(3H)-quinazolinone oxalate 35739-53-8 4(3H)-Quinazolinone, 3-(4-(diethylamino)-2-butynyl)-7-methoxy-, oxalate (1:1) 4(3H)-Quinazolinone, 3-(4-(diethylamino)-2-butynyl)-7-methoxy-, oxalate(1:1)