A New Sterol Diglycoside from Conyza floribunda
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Date
2009Author
Opiyo, Sylvia A.
Ogur, Joseph A.
Manguro, Lawrence O.A.
Tietze, Lutz F.
Schuster, Heiko
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Chemical investigation of CH2Cl2 and MeOH extracts of Conyza floribunda have led to the isolation of (24S)-ethylcholesta-5, 22E, 25-trien-3-O-glucosyl (1” 4’)-rhamnoside (1), (24S)-ethylcholesta-5,25-dien-3-O- -glucoside (2), cyasterone (3), stigmasta 5, 22-dien-3-acetate (4), stigmasta 5, 22-dien-3-ol (5), spinasta 7, 22-dien-3-ol (6), 3-oxofriedooleanane (7), 3-hydroxyfriedooleanane (8), 3-acetoxyfriedooleanane (9), betullinic acid (10), quercetin 3-O- -glucoside (11), quercetin (12), myricetin (13) and kaempferol (14). Their structures were determined using spectroscopic and physical methods as well as comparison with data available in the literature.
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