Using CCO, Nc1n[nH]c2ccc(-c3cccc4[nH]ccc34)cc12 to produce Nc1n[nH]c2ccc(-c3cccc4c3CC(=O)N4)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.