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