Using CCOC(=O)[C@@H](O)[C@@H](N)C(=O)OCC, COc1ncnc2c(C=O)cn(COCc3ccccc3)c12 to produce CCOC(=O)[C@@H](O)[C@@H](NCc1cn(COCc2ccccc2)c2c(OC)ncnc12)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.