European Pharmacopoeia (EP) Reference Standard Synonym(s): Guaiacol glyceryl ether; 3-( o -Methoxyphenoxy)-1,2-propanediol; Glycerol guaiacolate; Guaifenesin Amino Acid Sequence: Empirical Formula: C₁₀H₁₄O₄ Formula Weight: 198.22 Linear Formula: …