Using CCCCc1nc(Cl)c(CO)n1Cc1ccc(-c2cccc(C(=O)O)c2)cc1, CC(C)(C)C(=O)OCCl to produce CCCCc1nc(Cl)c(CO)n1Cc1ccc(-c2cccc(C(=O)OCOC(=O)C(C)(C)C)c2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.