European Pharmacopoeia (EP) Reference Standard Synonym(s): 1-Cyclohexyl-3-{4-[2-(5-methylpyrazine-2-carboxamido)ethyl]phenylsulfonyl}urea Amino Acid Sequence: Empirical Formula: C₂₁H₂₇N₅O₄S Formula Weight: 445.54 Linear Formula: …