title: Hydrazinolysis of gramicidin A: a novel colour reaction for the detection and determination of the formyl group as n-formyl-n'-2,4-dinitrophenylhydrazine.
mesh_terms: D003124:Colorimetry; D005561:Formates / Q000032:analysis*; D008722:Methods; D010659:Phenylhydrazines / Q000032:analysis*; D014449:Tyrothricin / Q000032:analysis*
chemical_list: D005561:Formates; D010659:Phenylhydrazines; D014449:Tyrothricin