You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,8aR)-1-cyclohexyl-2-[(2,3-dimethoxyphenyl)methyl]-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H34N2O2
assistant