Fig. 1.

Structure of PL and timeline depicting the treatment of PL. The molecular formula of PL is C₁₇H₁₉NO₅. Its molecular weight is 317.34 g/mol (a). Arrow heads represent days on which acquisition tests were conducted. Inhibitory effect of PL on LPS-induced memory defects (b). Mice were treated with PL (1.5 or 3.0 mg/kg/day, i.p.) 1 h after treatment of LPS (0.25 mg/kg/day, i.p.) for 7 days. The Morris water maze test, probe test, and passive avoidance test were performed as described in the “Materials and Methods” section