You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (8S)-8-(pyridin-4-ylmethoxymethyl)-2-(pyridin-3-ylmethyl)-5lambda6-thia-2-azaspiro[3.4]octane 5,5-dioxide ?
user
C19H23N3O3S
assistant