Using CCCC(O)(CCC)CCc1cccc(C(O)CCNC(=O)OC(C)(C)C)c1 to produce CCCC(O)(CCC)CCc1cccc(C(O)CCNC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.