Using COC(=O)Cc1nnc(-c2nn(Cc3ccccc3F)c3ncccc23)nc1N to produce O=C1Cc2nnc(-c3nn(Cc4ccccc4F)c4ncccc34)nc2N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.