Using COC(=O)c1ccc(C=C2CCOc3cc4c(cc32)C(C)(C)CCC4(C)C)cc1 to produce CC1(C)CCC(C)(C)c2cc3c(cc21)OCC=C3Cc1ccc(C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.