You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-(5-hex-1-ynyl-2,4-dioxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methyl dihydrogen phosphate is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H21N2O8P
assistant