Using COc1cc(NCCCC(C)N2C(=O)c3ccccc3C2=O)c2nc(C)cc(C)c2c1OC to produce COc1cc(NCCCC(C)N)c2nc(C)cc(C)c2c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.