Using NC(N)=S, CCOC(=O)c1c(NC(=O)C=CC(=O)O)sc(C)c1C to produce CCOC(=O)c1c(NC(=O)CC2SC(N)=NC2=O)sc(C)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.