Reactant involved in synthesis of polo-like kinase 1 inhibitors. Product Application： Reactant involved in synthesis of polo-like kinase 1 inhibitors Phenylguanidine carbonate salt may be used in the preparation of the following bioactive compounds: • (E)-methyl 2-(2-((6-cyclopropyl-2-(phenylamino)pyrimidin-4-yloxy)methyl)phenyl)-3-methoxyacrylate • cyprodinil • 5,6-dihydropyrido[2,3-d]pyrimidine • ethyl 1-methyl-8-(phenylamino)-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxylate • 2-(phenylamino)-4-(trifluoromethyl)-1,6-dihydropyrimidine derivatives