You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tetrasodium;[[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] [[[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] phosphate;methane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H26N4Na4O23P4
assistant