You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule tert-butyl 5-methoxy-1,13,13-trimethyl-10-azatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-10-carboxylate .
user
C21H31NO3
assistant