Using CN1C2CC(O)CC1C1OC12, COC(=O)C(O)(c1cccs1)c1cccs1 to produce CN1C2CC(OC(=O)C(O)(c3cccs3)c3cccs3)CC1C1OC12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.