You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
S-[2-[[(2S,4aR,6R,7R,7aR)-7-chloro-6-(2,4-dioxopyrimidin-1-yl)-7-methyl-2-oxo-4,4a,6,7a-tetrahydrofuro[3,2-d][1,3,2]dioxaphosphinin-2-yl]oxy]ethyl] 3-(ethoxycarbonylamino)-2,2-dimethylpropanethioate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H29ClN3O10PS
assistant