You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (3-methylphenyl)-[(7S)-7-pyridin-2-yloxy-5-thia-2-azaspiro[3.4]octan-2-yl]methanone using the IUPAC nomenclature.
user
C19H20N2O2S
assistant