You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the SMILES representation of the molecule with IUPAC name 1-[3-[butyl(ethyl)amino]propyl]-6-[(dibutylamino)methyl]-N-(3-methoxyphenyl)benzimidazol-2-amine ?
user
CCCCN(CC)CCCN1C(NC2=CC=CC(OC)=C2)=NC2=CC=C(CN(CCCC)CCCC)C=C21
assistant