You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(2R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-2-ethyl-4-methoxyoxolan-3-yl] dihydrogen phosphate .
user
C12H20N3O7P
assistant