Using O=C(N[C@H]1CCNC1)C(F)(F)F, CCOC(=O)c1c2n(c3c(F)c(F)c(F)cc3c1=O)C(C)S2 to produce CCOC(=O)c1c2n(c3c(F)c(N4CC[C@H](NC(=O)C(F)(F)F)C4)c(F)cc3c1=O)C(C)S2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.