You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3S)-4-(furan-2-carbonyl)-3-methylpiperazin-1-yl]-3-[(4R)-4-(2-methylphenyl)-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H31N3O3S
assistant