Using [BH3-]C#N, O=c1[nH]c(-c2ccc(C3CCNCC3)cc2)cn2cccc12 to produce CN1CCC(c2ccc(-c3cn4cccc4c(=O)[nH]3)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.