You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[9-(2,3-dihydro-1H-inden-5-ylmethyl)-2-oxa-9-azaspiro[5.5]undecan-3-yl]methyl]ethanesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H34N2O3S
assistant