Using COc1ccc(CN(Cc2ccc(OC)cc2)c2nc3ccccc3c3c2nc(N)n3CCCNC(=O)OC(C)(C)C)cc1 to produce NCCCn1c(N)nc2c(N)nc3ccccc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.