Using CCOC(=O)COc1cc(C2COc3c(C)c(C)c(NC(=O)CC(C)(C)C)c(C)c32)ccc1C(C)C to produce Cc1c(C)c2c(c(C)c1NC(=O)CC(C)(C)C)C(c1ccc(C(C)C)c(OCCO)c1)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.