You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (1R,5S,6S)-3-[(4-methoxyphenyl)methyl]-N-(pyridin-3-ylmethyl)-8-oxa-3-azabicyclo[3.2.1]octane-6-carboxamide ?
user
C21H25N3O3
assistant