(E)-7-(3-(4-Hydroxyphenyl)-1-oxo-2-propenyl)-2,2,4-trimethyl-2H-1,4-benzoxazin-3(4H)-one 123172-64-5 2H-1,4-Benzoxazin-3(4H)-one, 7-(3-(4-hydroxyphenyl)-1-oxo-2-propenyl)-2,2,4-trimethyl-, (E)- BRN 5984275