Using CCCCCCc1ccc(-c2ncc(-c3ccc(O)cc3)s2)cc1, O=C(O)CCCc1ccccc1 to produce CCCCCCc1ccc(-c2ncc(-c3ccc(OC(=O)CCCc4ccccc4)cc3)s2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.