Using NCCO, COc1ncnc(Cn2cc(C(=O)O)c3ncccc32)c1C to produce COc1ncnc(Cn2cc(C(=O)NCCO)c3ncccc32)c1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.