1H,5H,11H-(1)Benzopyrano(6,7,8-ij)quinolizine-10-carbonitrile, 2,3,6,7-tetrahydro-11-oxo- 2,3,6,7-Tetrahydro-11-oxo-1H,5H,11H-(1)benzopyrano(6,7,8-ij)quinolizine-10-carbonitrile 55804-68-7 EINECS 259-827-2 NSC 338968