European Pharmacopoeia (EP) Reference Standard Synonym(s): Pyrantel pamoate; 1-Methyl-2-(2-[2-thienyl]ethenyl)-1,4,5,6-tetrahydropyrimidine compound with 4,4'-methylenebis(3-hydroxy-2-naphthoic acid); Pyrantel embonate Empirical Formula: C34H30N2O6S...