120280-37-7 2-(6-Cyano-2,2-dimethyl-2H-1-benzopyran-4-yl)pyridine-1-oxide 2H-1-Benzopyran-6-carbonitrile, 2,2-dimethyl-4-(1-oxido-2-pyridinyl)- 2H-1-Benzopyran-6-carbonitrile, 2,2-dimethyl-4-(2-pyridinyl)-, N-oxide Ro 31-6930