Using ethyl 2-mercaptoacetate, 3-butyl-3-ethyl-7-fluoro-4-hydroxy-5-phenyl-2,3,4,5-tetrahydrobenzo[b]thiepine 1,1-dioxide to produce 2-((3-butyl-3-ethyl-4-hydroxy-1,1-dioxido-5-phenyl-2,3,4,5-tetrahydrobenzo[b]thiepin-7-yl)thio)acetic acid, please predict the condition, including solvent and agent in SMILES notation in json format like:

```JSON
{
    "solvent": [
        "CCN(CC)CC",
        "CCOC(C)=O"
    ],
    "agent": [
        "On1nnc2ccccc21",
        "C(=NC1CCCCC1)=NC1CCCCC1",
        "Cl"
    ]
}
```
