You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[(3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-(3-pyridin-2-ylpropyl)piperidin-3-yl]acetic acid .
user
C28H28Cl2N2O3
assistant