Abstract
Abstract Thirty-three Sonchus , one Embergeria , one Babcockia and five Taeckholmia species were surveyed for their phenolic constituents. The coumarins scopoletin and aesculetin were found as major constituents of Embergeria, Babcockia and Taeckholmia species, and in lesser amount in some Sonchus species. Six flavone glycosides were identified: apigenin 7-glucuronide, apigenin 7-rutinoside, luteolin 7-glucoside, luteolin 7-glucuronide, luteolin 7-rutinoside and luteolin 7-glucosylglucuronide and the systematic significance of their distribution is discussed.
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