Using CCNC(=O)c1ccc(-n2nnc(C(=O)NC3CC3)c2COc2cccc(C(C)=O)c2)cc1, NO to produce CCNC(=O)c1ccc(-n2nnc(C(=O)NC3CC3)c2COc2cccc(C(C)=NO)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.