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 (2R,4S,5S,6R)-8-(2-fluoroethyl)-4-(4-methylphenyl)-1-azatricyclo[4.2.0.02,8]octane-5-carboxylate ?
user
C18H22FNO2
assistant