(E)-7-(1-Oxo-3-phenyl-2-propenyl)-2,2,4-trimethyl-2H-1,4-benzoxazin-3(4H)-one 123172-58-7 2H-1,4-Benzoxazin-3(4H)-one, 7-(1-oxo-3-phenyl-2-propenyl)-2,2,4-trimethyl-, (E)- BRN 5971518