title: [Studies on the Voges-Proskauer reaction. IV. Structural determination of colored substance obtained from 1,1-dimethylguanidine, 1,1-pentamethyleneguanidine and morpholinoamidine (on the structure of pigment A2)].
mesh_terms: D000578:Amidines; D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D003116:Color; D006146:Guanidines; D009025:Morpholines; D010860:Pigments, Biological / Q000302:isolation & purification; D013057:Spectrum Analysis
chemical_list: D000578:Amidines; D006146:Guanidines; D009025:Morpholines; D010860:Pigments, Biological