You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R)-N-[1-(2-amino-2-oxoethyl)piperidin-4-yl]-2-(3,4-dimethylphenyl)cyclopropane-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H27N3O2
assistant