You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[(3S,4R)-3-amino-4-(1-methylimidazol-4-yl)pyrrolidin-1-yl]-3-(1-benzofuran-2-yl)propan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C19H22N4O2
assistant