title: Differential spectrophotometric estimation of some pharmaceutical compounds. I. Applying relative absorbance value.
mesh_terms: D003061:Codeine / Q000032:analysis*; D004837:Epinephrine / Q000032:analysis*; D010830:Physostigmine / Q000032:analysis*; D013053:Spectrophotometry
chemical_list: D010830:Physostigmine; D003061:Codeine; D004837:Epinephrine