2,3-Dihydro-9H-isoxazolo(3,2-b)quinazolin-9-one 37795-69-0 9H-Isoxazolo(3,2-b)quinazolin-9-one, 2,3-dihydro- 9H-Isoxazolo[3,2-b]quinazolin-9-one, 2,3-dihydro- NSC294836 W-2429