You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-cyclopropyl-6-methylpyrimidin-5-yl)-8-[(2R)-1,1-difluoropropan-2-yl]-6-[(5-ethylsulfanylpyrimidin-2-yl)methylamino]-4-methylpteridin-7-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27F2N9OS
assistant