英文同义词: | 7-(ethylamino)-6-methyl-4-(trifluoromethyl)-2h-1-benzopyran-2-on;COUMARIN 307;COUMARIN 503;Exciton Coumarin 503;Coumarin 307, 98%, laser grade, pure;7-(ethylamino)-6-methyl-4-(trifluoromethyl)-2H-chromen-2-one;4-(Trifluoromethyl)-6-methyl-7-(ethylamino)-2H-1-benzopyran-2-one;Coumarin 307,98%,pure,laser grade |