You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-amino-N-(3-butoxy-2,2-dimethylcyclobutyl)-4-methylsulfanylbutanamide;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H31ClN2O2S
assistant