Using O=C(NCC1CN(C2=Nc3ccccc3Sc3ccccc32)CCN1CCOCCO)C(F)(F)F to produce NCC1CN(C2=Nc3ccccc3Sc3ccccc32)CCN1CCOCCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.