34197-46-1 4-((Aminoiminomethyl)amino)-4-methyl-2-oxo-2H-1-benzopyran-7-yl ester benzoic acid, monohydrochloride 4-Methyl-2-oxo-2H-1-benzopyran-7-yl 4-guanidinobenzoate monohydrochloride EINECS 251-871-0