Using COC(=O)c1cccc(S(=O)(=O)c2ccc3c(c2)CC[C@H](CN(C[C@H](O)c2cccnc2)C(=O)OC(C)(C)C)O3)c1 to produce O=C(O)c1cccc(S(=O)(=O)c2ccc3c(c2)CC[C@H](CNC[C@H](O)c2cccnc2)O3)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.