Using Cn1nc(C2=CCCC2)c(-c2ccc3c(c2)CCCO3)c1C(OC(C)(C)C)C(=O)O to produce Cn1nc(C2CCCC2)c(-c2ccc3c(c2)CCCO3)c1C(OC(C)(C)C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.