15119-34-3 2-Oxo-2H-1-benzopyran-3-carbonitrile 2H-1-Benzopyran-3-carbonitrile, 2-oxo- 3-Cyanocoumarin 5-18-08-00324 (Beilstein Handbook Reference) BRN 0142122 Coumarin, 3-cyano- (7CI,8CI)