Using CC(=O)O[C@H](C)C(=O)Nc1nc(CN2CCC(c3c[nH]c4ccccc34)CC2)cs1 to produce C[C@@H](O)C(=O)Nc1nc(CN2CCC(c3c[nH]c4ccccc34)CC2)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.