You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(2,3-dimethylphenoxy)butanoylamino]-6-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28N2O3S
assistant