You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-methyl-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)-2-thiomorpholin-3-ylethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H20N2OS2
assistant