You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[3-[[(3aR,8aR,9aR)-8a-methyl-5-methylidene-2-oxo-3a,4,4a,6,7,8,9,9a-octahydro-3H-benzo[f][1]benzofuran-3-yl]methylamino]propyl]pyrrolidin-2-one .
user
C22H34N2O3
assistant