Using O=C(O)Cn1cc(-c2ccnc3[nH]ccc23)c(-c2ccc(NC(=O)Nc3ccccc3)cc2)n1, NCCO to produce O=C(Cn1cc(-c2ccnc3[nH]ccc23)c(-c2ccc(NC(=O)Nc3ccccc3)cc2)n1)NCCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.