Using COCCl, CC1(c2ccc(O)cc2)COc2cc(O)ccc2C1=O to produce COCOc1ccc2c(c1)OCC(C)(c1ccc(O)cc1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.