29197-94-2 7-[(Sulfomethyl)amino]-4-methyl coumarin sodium salt Coumarin 175 Coumarin, 4-methyl-7-[(sulfomethyl)amino]-, monosodium salt Methanesulfonic acid, [(4-methyl-2-oxo-2H-1-benzopyran-7-yl)amino]-, monosodium salt NSC338965