1897-89-8 2-[2-(2-Pyridyl)vinyl]-3-o-tolyl-4(3H)-quinazolinone 4(3H)-Quinazolinone, 2-[2-(2-pyridyl)vinyl]-3-o-tolyl- 4(3H)-Quinazolinone, 3-(2-methylphenyl)-2-[2-(2-pyridinyl)ethenyl]- B 169 NSC96996 Piriqualone