Using CN1CCN(c2cc(-c3cc4c(cc3F)CCN(C(=O)OC(C)(C)C)C4)nc(N)n2)CC1 to produce CN1CCN(c2cc(-c3cc4c(cc3F)CCNC4)nc(N)n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.