Using pivaloyl chloride, 9-(4-hydroxy-3-(hydroxymethyl)butyl)-2-(methoxy(trityl)amino)-1,9-dihydro-6H-purin-6-one to produce 2-(2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl)propane-1,3-diyl bis(2,2-dimethylpropanoate), 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"
    ]
}
```
