Using O=C(Nc1ccccc1)OCCCC(=O)c1ccccc1, CNC(=S)NN to produce CNC(=S)NN=C(CCCOC(=O)Nc1ccccc1)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.