You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-[(1S,5R,6S,8R,10S)-9,9-dimethyl-5-propyl-4-oxatricyclo[6.2.1.01,6]undecan-10-yl]propanamide ?
user
C18H31NO2
assistant