3(4H)-Quinazolineacetic acid, 4-oxo-2-phenyl-alpha-(phenylmethyl)-, compd. with piperazine (2:1) 70203-83-7 Piperazine, bis(4-oxo-2-phenyl-alpha-(phenylmethyl)-3(4H)-quinazolineacetate) alpha-Benzyl-4-oxo-2-phenyl-3(4H)-quinazineacetic acid piperazine (salt) (2:1)