You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,5R,6R,7S)-3-[(2-chlorophenyl)methyl]-4-oxo-N-(pyridin-3-ylmethyl)-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H20ClN3O3
assistant