You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S,3R,4R,5R)-5-(hydroxymethyl)-3-methyl-2-[4-(methylamino)furo[3,2-d]pyrimidin-7-yl]oxolane-3,4-diol by IUPAC nomenclature, provide its molecular formula.
user
C13H17N3O5
assistant