Isolation of new aliphatic ester 8′α-hydroxy-n-decanyl n-docosanoate from the leaves of Centaurothamnus maximus Wagentz and Dittri

Centaurothamnus maximus (Asteraceae) is a wild and one of the least explored plants of Saudi Arabia. Yellow amorphous powder compound 1 (CM-1) was obtained after eluting the ethanol extract from reverse phase column (RP-18) by chloroform eluent of mobile phase. This is a new ester of decanediol esterified with behenic acid isolated for the first time from the plant source. The chemical structure of compound (CM-1) was established as 8′α-hydroxy-n-decanyl n-docosanoate after UV, IR, ¹H NMR, ¹³C NMR, COSY, HSQC, HMBC and MASS spectroscopic studies. Two known compounds n-hexatriacosanoic acid (CM-2) and stigmasterol (CM-3) were also isolated and identified by spectroscopic studies.