Using NCC1(c2nc(-c3ccccc3)cs2)CCOCC1, CC(=O)O[BH-](OC(C)=O)OC(C)=O to produce CNCC1(c2nc(-c3ccccc3)cs2)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.