101646-10-0 2,2'-(2-Phenylethenylidene)bis-4H-3,1-benzoxazin-4-one 2,2'-Phenylethenilidenebis(3,1-benzoxazin-4-one) 4H-3,1-Benzoxazin-4-one, 2,2'-(2-phenylethenylidene)bis-