You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2-bicyclo[2.2.1]hept-5-enylmethyl)-4-[(2,3,4-trimethoxyphenyl)methyl]piperazine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H32N2O3
assistant