Using CC(C)(C)OC(=O)N=C(N)N(Cc1ccc(OCCCO)c(Br)c1)C(=O)OC(C)(C)C, trifluoromethanesulfonic anhydride to produce 3-(4-((1,2-bis(tert-butoxycarbonyl)guanidino)methyl)-2-bromophenoxy)propyl trifluoromethanesulfonate, 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"
    ]
}
```
