Using Cn1c(-c2cccc(N3CCNCC3)c2)nc2ccccc21, O=C(O)C1CC1 to produce Cn1c(-c2cccc(N3CCN(C(=O)C4CC4)CC3)c2)nc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.