Using COc1ccc2c3c(c4ccccc4cc13)C(=O)N(CCN(C)CCNC(=O)OC(C)(C)C)C2=O to produce COc1ccc2c3c(c4ccccc4cc13)C(=O)N(CCN(C)CCN)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.