27425-55-4 2H-1-Benzopyran-2-one, 3-(1H-benzimidazol-2-yl)-7-(diethylamino)- 3-(2-Benzimidazolyl)-7-(diethylamino)coumarin Coumarin 7 Coumarin, 3-(2-benzimidazolyl)-7-(diethylamino)- NSC303254