A methanol extract of red pepper showed potent acetyl-CoA carboxylase inhibitory activity. The active principles were isolated and identified as (E, E)- and (E, Z)-9-oxooctadeca-10,12-dienoic acids by instrumental analyses. The IC50 values of the compounds were 1.4×10-6 and 1.5×10-6 M, respectively, their activity being nearly sixty-times higher than that of the common fatty acids themselves. A comparative study of the structure-activity relationship among their related compounds showed that the inhibitory activity was influenced neither by the position and species of the oxygen functional group in the middle of the alkyl chain nor by the configurations of the double bonds. However, it was found that the presence of double bonds between the terminal carboxyl and the mid-chain oxygen functional group lowered the inhibitory activity which could be recovered by hydrogenation of the double bonds.
红椒的
甲醇提取物显示出强效的
乙酰辅酶A羧化酶抑制活性。通过仪器分析分离并确认了活性成分为(E, E)-和(E, Z)-9-氧代
十八烯-10,12-二酸。该化合物的IC50值分别为1.4×10^-6 M和1.5×10^-6 M,其活性几乎是常见
脂肪酸的六十倍。对相关化合物的结构-活性关系进行的比较研究表明,抑制活性既不受烷基链中氧官能团的位置和种类的影响,也不受双键的构型影响。然而,发现末端羧基和中链氧官能团之间存在双键会降低抑制活性,而通过氢化双键可以恢复这种活性。