You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-hydroxy-6-oxo-1H-pyridine-4-carboxylic acid;6-methyl-1,3,5-triazine-2,4-diamine;6-phenyl-1,3,5-triazine-2,4-diamine;1H-1,2,4-triazol-5-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H25N15O4
assistant