Using CCOC(OCC)OCC, CC[C@]12CC[C@H]3[C@@H](CCC4=CC(=O)CC[C@@H]43)[C@@H]1[C@@H](OC(C)=O)CC2=O to produce CCOC1=CC2=CC[C@@H]3[C@H](CC[C@]4(CC)C(=O)C[C@H](OC(C)=O)[C@@H]34)[C@H]2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.