Research Article

Semisynthesis of Derivatives of Oleanolic Acid from Syzygium aromaticum and Their Antinociceptive and Anti-Inflammatory Properties

Figure 2

Analgesic effect of OA and its acetyl derivatives on tail flick response induced by radiant heat. OA (oleanolic acid), AOA (3-acetyloleanolic acid), AOAm (28-methylester, 3-acetyloleanane), and OAm (28-methyloleanane). Values are presented as mean reaction time in seconds ± SEM for 6 animals; and . (a) shows a comparison of the tested compounds with control group, whereas (b) shows comparison of the OA with acetyl derivatives of OA.
(a)
(b)