Nesacaine (chloroprocaine) and Nesacaine (chloroprocaine) -MPF Injections are sterile non pyrogenic local anesthetics. The active ingredient in Nesacaine and Nesacaine-MPF Injections is chloroprocaine HCl (benzoic acid, 4-amino-2-chloro-2-(diethylamino) ethyl ester, monohydrochloride), which is represented by the following structural formula: