(E)-7-(3-(4-Chlorophenyl)-1-oxo-2-propenyl)-4-methyl-2H-1,4-benzoxazin-3(4H)-one 123172-59-8 2H-1,4-Benzoxazin-3(4H)-one, 7-(3-(4-chlorophenyl)-1-oxo-2-propenyl)-4-methyl-, (E)- BRN 5983033