Using O=C(NC1=NC2(c3ccccc3F)CN(c3ncc(F)cn3)CC2CS1)c1ccccc1 to produce NC1=NC2(c3ccccc3F)CN(c3ncc(F)cn3)CC2CS1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.