Using COc1cc(OC)nc(Cl)n1, CSCCOC(=O)c1c(O)cccc1O to produce COc1cc(OC)nc(Oc2cccc(Oc3nc(OC)cc(OC)n3)c2C(=O)OCCSC)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.