5,6,7,8-Tetrahydro-7,7-dimethyl-5-oxo-4-methyl-2-[(triphenylphosphoranylidene)amino]-,4H-1-benzopyran-3-carboxylic acid ethyl ester
Methanimidic acid, N-(3-cyano-5,6,7,8-tetrahydro-7,7-dimethyl-5-oxo-4-phenyl-4H-1-benzopyran-2-yl)-, ethyl ester