You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 8-(3-methylphenyl)sulfonyl-2-(2-methylsulfanylethyl)-4-prop-2-enyl-1,4,8-triazaspiro[4.5]decan-3-one .
user
C20H29N3O3S2
assistant