Using 3-(4-(tert-butoxycarbonyl)piperazin-1-yl)propanoic acid, methyl 2-(4-(((3-(6-amino-2-butoxy-8-oxo-7,8-dihydro-9H-purin-9-yl)propyl)amino)methyl)phenyl)acetate to produce methyl 2-(4-((N-(3-(6-amino-2-butoxy-8-oxo-7,8-dihydro-9H-purin-9-yl)propyl)-3-(piperazin-1-yl)propanamido)methyl)phenyl)acetate, 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"
    ]
}
```
