Using 1-benzyl 19-(tert-butyl) (2S,5S,8S,11S,14S)-14-(2-(tert-butoxy)-2-oxoethyl)-11-(3-(tert-butoxy)-3-oxopropyl)-5-(tert-butyl)-2-isobutyl-8-(2-methylbenzyl)-4,7,10,13,16-pentaoxo-3,6,9,12,15-pentaazanonadecanedioate to produce L-leucine, 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"
    ]
}
```
