Using C[C@H]1CN(C(=O)OC(C)(C)C)c2nc3c(N)nc4ccccc4c3n21 to produce C[C@H]1CNc2nc3c(N)nc4ccccc4c3n21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.