Using COC(=O)CC1CCN(C(=O)NCCCc2ccc3c(n2)NCCC3)Cc2cc(Cl)ccc21 to produce O=C(O)CC1CCN(C(=O)NCCCc2ccc3c(n2)NCCC3)Cc2cc(Cl)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.