with hetero atoms directly attached to nitrogen atoms of the hetero ring

Full Title

Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings > condensed with carbocyclic rings or ring systems > Quinazolines; Hydrogenated quinazolines > with hetero atoms directly attached in position 4 > Oxygen atoms > with hetero atoms directly attached to nitrogen atoms of the hetero ring