Using (2S,3R)-2-amino-N-((R)-1-(((S)-1-(benzyl(methyl)amino)-1-oxo-3-phenylpropan-2-yl)amino)-3-(1-formyl-1H-indol-3-yl)-1-oxopropan-2-yl)-3-hydroxybutanamide, aceticanhydride to produce (2S,3R)-2-acetamido-N-((R)-1-(((S)-1-(benzyl(methyl)amino)-1-oxo-3-phenylpropan-2-yl)amino)-3-(1-formyl-1H-indol-3-yl)-1-oxopropan-2-yl)-3-hydroxybutanamide, 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"
    ]
}
```
