You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[(2R,4R)-4-acetylsulfanyloxolan-2-yl]methoxy-hydroxyphosphoryl]oxyethyl-trimethylazanium by IUPAC nomenclature, provide its molecular formula.
user
C12H25NO6PS+
assistant