Two new monoterpene esters from Illigera paviflora Dunn roots

Two new monoterpene esters, illigerates H and I (1 and 2), and six known compounds actinodaphine (3), bulbocupnine (4), stephanine (5), hypserpanine B (6), betulinic acid (7) and gallic acid (8) were obtained from the root of Illigera paviflora Dunn. Their structures were elucidated by spectroscopic analysis. Anti-inflammatory and α-glucosidase inhibitory activity of some isolated compounds were assessed. Two monoterpenes 1 and 2 exhibited weak in vitro anti-inflammatory activity (IC₅₀ 64.5 ± 5.3 and 79.2 ± 7.5 μM) while compounds 3–6 showed inhibition of α-glucosidase with IC₅₀ values ranged from 87.17 to 118.74 μM.