Using Cc1cn(C2CSC(COCc3ccccc3)CO2)c(=O)[nH]c1=O, CO to produce Cc1cn(C2C[SH](CO)CCO2)c(=O)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.