3(4H)-Quinazolinepropanoic acid, 4-oxo-2-phenyl-, compd. with piperazine (2:1) 4-Oxo-2-phenyl-3(4H)-quinazolinepropanoic acid compd. with piperazine (2:1) 70203-79-1 Piperazine, bis(4-oxo-2-phenyl-3(4H)-quinazolinepropanoate)