2H-1-Benzopyran-2-one, 3-(2-benzothiazolyl)-7-(diethylamino)- 3-(Benzothiazol-2-yl)-7-(diethylamino)-2-benzopyrone 38215-36-0 54576-82-8 Coumarin 6 EINECS 253-830-2 NSC 290432