Using Cc1ncoc1Cn1c(=O)n(C2CCN(C(=O)OC(C)(C)C)CC2)c(=O)c2sc(-c3ccccc3)cc21 to produce Cc1ncoc1Cn1c(=O)n(C2CCNCC2)c(=O)c2sc(-c3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.