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 methyl (1S,2R,3R,5S,6S,8R,10R)-10-cyano-5-(3-methoxyphenyl)-11-methyl-7-oxo-4,11-diazatricyclo[6.2.1.02,6]undecane-3-carboxylate ?
user
C20H23N3O4
assistant