Using CC(=O)OC(C)=O, COc1ccc2c3c1O[C@H]1[C@@H](O)C=C[C@H]4[C@@H](C2)N(C)CC[C@@]341 to produce COc1ccc2c3c1O[C@H]1[C@@H](OC(C)=O)C=C[C@H]4[C@@H](C2)N(C)CC[C@@]341, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.