You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-8-[(2S,5S)-2,5-dihydroxycyclopentyl]-2-(4-methylcyclohexyl)oxypyrido[2,3-d]pyrimidin-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H26N4O4
assistant