1-(((1-Oxooctadecyl)amino)methyl)pyridinium chloride 1-(Stearamidomethyl)pyridinium chloride 4261-72-7 EINECS 224-240-2 NSC 30478 Pyridinium, 1-(((1-oxooctadecyl)amino)methyl)-, chloride Pyridinium, 1-(stearamidomethyl)-, chloride Quarpel Stearylamidomethyl pyridinium chloride Velan PF Zelan AP