Using COC1(NC(=O)C(=NOC(c2ccccc2)(c2ccccc2)c2ccccc2)c2cccs2)C(=O)N2C(C(=O)[O-])=C(COC(C)=O)CS[C@@H]21 to produce CO[C@@]1(NC(=O)C(=NO)c2cccs2)C(=O)N2C(C(=O)O)=C(COC(C)=O)CS[C@@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.