You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(2-fluorophenyl)piperazin-1-yl]-[5-methyl-4-(4-methylpiperidin-1-yl)thieno[2,3-d]pyrimidin-6-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H28FN5OS
assistant