Using NCc1ccc(CN(Cc2nc3ccccc3[nH]2)C2CCCc3cccnc32)cc1, CCCC=O to produce CCCCNCc1ccc(CN(Cc2nc3ccccc3[nH]2)C2CCCc3cccnc32)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.