title: Colorimetric determination of glyceryl guaiacolate.
mesh_terms: D000447:Aldehydes; D003124:Colorimetry; D006140:Guaifenesin / Q000032:analysis*; D008722:Methods; D013055:Spectrophotometry, Infrared; D013806:Theophylline; D013997:Time Factors
chemical_list: D000447:Aldehydes; D006140:Guaifenesin; D013806:Theophylline