Using Cn1c(=O)ccc2cc(OCCCN(CCNC(=O)OC(C)(C)C)Cc3ccncc3)ccc21 to produce Cn1c(=O)ccc2cc(OCCCN(CCN)Cc3ccncc3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.