126959-78-2 2-Propenoic acid, 3-(4-(2-(7-(dimethylamino)-2-oxo-2H-1,4-benzoxazin-3-yl)ethenyl)phenyl)- 4-(beta-(7-Dimethylamino-1,4-benzoxazin-2-one-3-yl)vinyl)phenylpropenoic acid 4-BVC