Using tfaa, tert-butyl (2S,3S,E)-3-(((S)-3-(4-(but-2-yn-1-yloxy)phenyl)-1-methoxy-1-oxopropan-2-yl)carbamoyl)-2-hydroxy-2-(2-hydroxyethyl)-12-oxononadec-4-enoate to produce (2S,3S,E)-3-(((S)-3-(4-(but-2-yn-1-yloxy)phenyl)-1-methoxy-1-oxopropan-2-yl)carbamoyl)-2-hydroxy-12-oxo-2-(2-(2,2,2-trifluoroacetoxy)ethyl)nonadec-4-enoic acid, 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"
    ]
}
```
