Flavonoids from two Parasitic and Achlorophyllous Plants, Aeginetia indica and Orobanche minor (Orabanchaceae)

Two parasitic and achlorophyllous species, Aeginetia indica and Orobanche minor belonging to the family Orobanchaceae, were surveyed for flavonoids. The flowers and aerial parts of A. indica were exracted with MeOH and the flavonoids were isolated by various chromatographical techniques. Two anthocyanins were obtained from the flowers together with other flavonoids, and characterized as cyanidin 3-O-rutinoside and 3-O-glycoside. Other flavonoids were identified as apigenin 7-O-glucuronide, luteolin 7-O-glucuronide, apigenin, luteolin, quercetin 3-O-rutinoside and naringenin 7-O-glucoside. They were also obtained from the aerial parts except for anthcyanins and luteolin. On the other hand, two flavonoids were isolated from the aerial parts of Orobanche minor and identified as luteolin 7-O-glucoside and 7-O-glucuronide.