Using Cn1nnnc1SCC1=C(C(=O)O)N2C(=O)C(NC(=O)Cc3csc(=O)s3)C2SC1, CC(C)(C)C(=O)OCI to produce Cn1nnnc1SCC1=C(C(=O)OCOC(=O)C(C)(C)C)N2C(=O)C(NC(=O)Cc3csc(=O)s3)C2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.