Using O=C1Nc2ccccc2Sc2ccccc21, S=P12SP3(=S)SP(=S)(S1)SP(=S)(S2)S3 to produce S=C1Nc2ccccc2Sc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.