Using benzyl (S)-2-amino-3-(4-(5-(4-methoxybenzyl)-1,1-dioxido-4-oxo-1,2,5-thiadiazolidin-2-yl)phenyl)propanoate, acetyl-L-phenylalanine to produce benzyl (S)-2-((S)-2-acetamido-3-phenylpropanamido)-3-(4-(5-(4-methoxybenzyl)-1,1-dioxido-4-oxo-1,2,5-thiadiazolidin-2-yl)phenyl)propanoate, 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"
    ]
}
```
