You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[1-[[3-(2,3,4-trimethoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]piperidin-4-yl]methyl]pyrrolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H30N4O5
assistant