(Z)-3,4-Dihydro-2-oxo-3-(phenylmethylene)-2H-1,4-benzoxazine-5-carboxylic acid 143651-44-9 2H-1,4-Benzoxazine-5-carboxylic acid, 3,4-dihydro-2-oxo-3-(phenylmethylene)-, (Z)- TA 3037A TA-3037A