Using CC(C)(C)OC(=O)NCCO, CCOCc1nc2cnc3ccccc3c2n1O to produce CCOCc1nc2cnc3ccccc3c2n1OCCNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.