Using CCC(O/N=C(\C(=O)NC1C(=O)N2C(C(=O)O)=C(CN)CS[C@H]12)c1csc(N)n1)C(=O)O, CC=O to produce CCNCC1=C(C(=O)O)N2C(=O)C(NC(=O)/C(=N\OC(CC)C(=O)O)c3csc(N)n3)[C@H]2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.