Phytochemical constituents and anti-tyrosinase activity of Macadamia integrifolia leaves extract.

In this study, ethanolic extract of M. integrifolia leaves was phytochemically investigated which led to the isolation of 6 compounds. Two functional galactolipids, i.e., monogalactosyl diacylglycrol 36:4 (MGDG 36:4), digalactosyl monoacylglycerol 18:2 (DGMG 18:2), gallic acid and protocatechuic acid were identified in the genus Macadamia for the first time, in addition to the cyanogenic glycoside dhurrin and β-sitosterol. Additionally, anti-tyrosinase activity of the extract, its fractions and isolated compounds was investigated and a good tyrosinase inhibitory activity was observed for the extract, IC50=85 µg/mL and its polar fractions (ethyl acetate at 60 µg/mL and n-butanol at 75 µg/mL), with gallic acid showing strong anti-tyrosinase activity at IC50 56 µg/mL. PMID: 33207965 [PubMed - as supplied by publisher]
Source: Natural Product Research - Category: Biochemistry Authors: Tags: Nat Prod Res Source Type: research