Using CCc1nc2c(N)nc3cc(OCCNC(=O)OC(C)(C)C)ccc3c2n1CC1CCOCC1 to produce CCc1nc2c(N)nc3cc(OCCN)ccc3c2n1CC1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.