New salicylic acid and isoflavone derivatives from Flemingia paniculata.
A new salicylic acid derivative, 2-carboxy-3-(2-hydroxypropanyl)phenol (1), and four new isoflavones, 5,7,4'-trihydroxy-8-(1,1-dimethylprop-2-enyl)isoflavone (2), 5,7,2',4'-tetrahydroxy-8-(1,1-dimethylprop-2-enyl)isoflavone (3), 5,2',4'-trihydroxy-4' ',4' ',5' '(xi)-trimethyl-4' ',5' '-dihydrofurano-(7,6,2' ',3' ')isoflavone (4), and 5,2',4'-trihydroxy-7-(3-methylbut-2-enyloxy)isoflavone (5), were isolated from the stem bark of Flemingia paniculata. The structures of these compounds were established unambiguously by spectroscopic data interpretation. The biogenetic pathways to 1 and 2-4 have been postulated.
Rahman
M Mukhlesur
MM
Phytochemistry Research Laboratory, Department of Pharmaceutical Sciences, University of Strathclyde, SIBS Building, 27 Taylor Street, Glasgow G4 ONR, Scotland, U.K.
Sarker
Satyajit D
SD
Byres
Maureen
M
Gray
Alexander I
AI
D001459:Bangladesh; D007887:Fabaceae / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry / Q000302:isolation & purification*
D007529:Isoflavones; D012459:Salicylates; C552928:flemingipanic acid