You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[hydroxy-[[(2R,3R,5R)-3-hydroxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy]phosphoryl] [(2R,4S,5S)-3,4,5-trihydroxy-6-(sulfanylmethyl)oxan-2-yl] hydrogen phosphate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H26N2O15P2S
assistant