You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3S,6R)-3-(2-methoxyphenyl)-5-(3-methoxypropyl)-1,5-diazatricyclo[5.2.2.02,6]undecane is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H30N2O2
assistant