Using O=C1CCCc2cccnc21, CC(C)(C)OC(=O)N[C@@H](CCCN)C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N[C@@H](CCCNC1CCCc2cccnc21)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.