6-(Aminoiminomethyl)-2-naphthalenyl 4-((aminoiminomethyl)amino)benzoate 6-Amidino2-naphthyl 4-guanidinobenzoate 81525-10-2 Benzoic acid, 4-((aminoiminomethyl)amino)-, 6-(aminoiminomethyl)-2-naphthalenyl ester Nafamostat Nafamostatum [Latin] p-Guanidinobenzoic acid ester with 6-hydroxy-2-naphthamidine