Using COc1ccc(C2=NC(=S)SC2c2ccc(OC)cc2)cc1, OCCCBr to produce COc1ccc(-c2nc(SCCCO)sc2-c2ccc(OC)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.