Using Oc1ncnc2[nH]c(-c3ccccc3)cc12, S=P12SP3(=S)SP(=S)(S1)SP(=S)(S2)S3 to produce Sc1ncnc2[nH]c(-c3ccccc3)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.