Using CC(=O)OCCBr, CO/N=C(\C(=O)NC1C(=O)N2C(C(=O)[O-])=C(COC(N)=O)CS[C@H]12)c1cscn1 to produce CO/N=C(\C(=O)NC1C(=O)N2C(C(=O)OC(C)OC(C)=O)=C(COC(N)=O)CS[C@H]12)c1cscn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.