Using COc1ccnc(C(=O)N[C@H]2COC[C@H](OCC(C)C)[C@@H](OCC(C)C)[C@H](C)OC2=O)c1O, COCCC(=O)Cl to produce COCCC(=O)Oc1c(OC)ccnc1C(=O)N[C@H]1COC[C@H](OCC(C)C)[C@@H](OCC(C)C)[C@H](C)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.