Using CC(C)(C)OC(=O)N1CCC(c2c(CO)cnn2C2CC2)CC1 to produce CC(C)(C)OC(=O)N1CCC(c2c(C=O)cnn2C2CC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.