Using ethyl carbonochloridate, ethyl 3-(5-((2,3-difluoro-6-(2-hydroxyethoxy)benzyl)oxy)-2-fluorophenyl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[3,4-d]pyrimidine-5-carboxylate to produce ethyl 3-(5-((6-(2-((ethoxycarbonyl)oxy)ethoxy)-2,3-difluorobenzyl)oxy)-2-fluorophenyl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[3,4-d]pyrimidine-5-carboxylate, 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"
    ]
}
```
