You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-1-[(2R,4R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidin-2-one;1H-pyrimidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H15F2N5O6
assistant