Using O=C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO, COCCN to produce COCCNC1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.