You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-butan-2-ylpiperazin-1-yl)-2-(cyclopentylamino)ethanone The above is the IUPAC name of a molecule. Write its SMILES notation.
user
CCC(C)N1CCN(C(=O)CNC2CCCC2)CC1
assistant