Patent ID: 8680158

Claim:
A method of inhibiting a PTGS suppressor protein from binding to a substance α, the method comprising: administering to an organism in need thereof an effective amount of at least one compound selected from the group consisting of: a cyclic ketone compound represented by the following formula (2): and the following reaction products i) and ii): i) a reaction product of croconic acid with hydrogen peroxide at a temperature of 20 to 30° C. for 3 days, the reaction product having 13C- NMR (D 2 O) spectra of δ 178.6, 129.5, 75.7; and ii) a reaction product of croconic acid with hydrogen peroxide at a temperature of 100° C. for 24 hours, the reaction product having 13C- NMR (D 2 O) spectra of δ 195.3, 193.9, 180.5, 178.7, 176.7, 161.7, 151.3, 150.0, 129.7, 75.8, 73.1, 72.5, 59.9, 45.9, 39.8.