Using C[C@H](c1ccccc1)N1CC[C@@H]2CNC[C@@H]21, C=O to produce C[C@H](c1ccccc1)N1CC[C@@H]2CN(C)C[C@@H]21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.