You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named carbonic acid;5-indolizin-2-yl-N-[(1S,2R)-2-phenylcyclopropyl]thiophene-2-sulfonamide is given. What is its corresponding molecular formula?
user
C22H20N2O5S2
assistant