You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(3,4-dimethoxyphenyl)methylamino]-2-oxoethyl] 1-pyridin-3-ylsulfonylpiperidine-4-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N3O7S
assistant