Using OCC(CO)(CO)CO, CC(S)C(=O)O to produce CC(S)C(=O)OCC(COC(=O)C(C)S)(COC(=O)C(C)S)COC(=O)C(C)S, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.