Using CC(C)O, COc1ccc(C2=N[C@H](C(=O)O)CS2)c(OC)c1 to produce COc1ccc(C2=N[C@H](C(=O)OC(C)C)CS2)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.