You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name methyl 2-[[(2R)-2-(3,4-dimethylphenoxy)propanoyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate ?
user
C21H25NO4S
assistant