You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (1R,2S)-N-[4-[(E)-4-amino-4-methoxy-2-oxobut-3-enyl]-5-(6-methoxypyridin-2-yl)-1,2,4-triazol-3-yl]-1-(5-chloropyrimidin-2-yl)-1-methoxypropane-2-sulfonamide is given. What is its corresponding molecular formula?
user
C21H25ClN8O6S
assistant