Using CCOP(=O)(COCCn1cnc2c(=O)[nH]c(NC(C)=O)nc21)OCC to produce CCOP(=O)(COCCn1cnc2c(=O)[nH]c(N)nc21)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.