You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2,4-dioxo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[3-(4-ethylpiperazin-1-yl)sulfonylphenyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H31N5O5S
assistant