title: [Studies on the analysis of proptocatechualdehyde. I. A sensitive colorimetric method for the determination of protocatechualdehyde in the presence of protocatechuic acid (author's transl)].
mesh_terms: D001547:Benzaldehydes / Q000032:analysis*; D002396:Catechols / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D062385:Hydroxybenzoates
chemical_list: D001547:Benzaldehydes; D002396:Catechols; D062385:Hydroxybenzoates; C009091:protocatechuic acid; C005581:protocatechualdehyde