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 (1R,5S,6S)-3-N-(2-methylphenyl)-6-N-phenyl-8-oxa-3-azabicyclo[3.2.1]octane-3,6-dicarboxamide .
user
C21H23N3O3
assistant