Using C[C@@H](O)[C@H]1C(=O)N2C(C(=O)[O-])=C(c3cn4cnc(SCCN)c4s3)[C@H](C)[C@H]12, CCOC=N to produce C[C@@H](O)[C@H]1C(=O)N2C(C(=O)[O-])=C(c3cn4cnc(SCCNC=N)c4s3)[C@H](C)[C@H]12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.