Using O=C(O)c1ccc(N2CCN(Cc3cnc4c(c3)NC(=O)[C@@H]3CCCN43)CC2)nc1, CCN to produce CCNC(=O)c1ccc(N2CCN(Cc3cnc4c(c3)NC(=O)[C@@H]3CCCN43)CC2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.