Using CC(=O)O[BH-](OC(C)=O)OC(C)=O, COCCNCc1nnc(C2CCN(c3ccccn3)CC2)n1Cc1ccccc1 to produce COCCN(C)Cc1nnc(C2CCN(c3ccccn3)CC2)n1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.