Using COC(=O)CCCC(C)N1CCN(c2ccc3ccccc3n2)CC1 to produce CC(CCCC(=O)O)N1CCN(c2ccc3ccccc3n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.