You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[3-(aminomethyl)-2-(methylamino)-5,7-dihydro-4H-thieno[2,3-c]pyridin-6-yl]propan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C12H19N3OS
assistant