Activity guided isolation of chemical constituents from the biologically active methanol extract of Euphorbia schimperi C. Presl

In this study we investigated the chemical constituents of bioactive methanol extract of Euphorbia schimperi C. Presl. For this the methanol extract was fractionated into 20, 40, 60, 80% MeOH in CHCl3, and 100% MeOH fractions respectively by vacuum liquid chromatography. Excision wound surface of the animals were topically treated with these fractions at a dose of 100 mg/kg body weight for twenty days. Povidone-iodine ointment was used as a reference drug. Wound contraction measurement and period of epithelialization were used to assess the effect of fractions on wound repairing. The 100% MeOH fraction treated animals achieved significant (p < 0.001) value by showing 100% wound contraction and minimum period of epithelization (17.75±0.47) on the 20th day as compared to standard drug treated animals on the same day. The active 100% MeOH fraction was subjected to various chromatographic techniques led to the isolation of miquelianin (1), kaempferol 3-O-glucuronide (2) and quercitrin (3). Compounds (1-3) were isolated from this plant for the first time.