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Table 1 Distribution of flavonoids in Cajanus cajan

From: The flavonoid profile of pigeonpea, Cajanus cajan: a review

Flavonoid class Name Structure Organ isolated from Reference
Flavones Apigenin 5,7,4′-trihydroxyflavone Leaves Fu et al. (2008); Zu et al. (2006); Wei et al. (2013a); Wei et al. (2013b)
  Vitexin Apigenin 8-C-glucoside Leaves Fu et al. (2007); Wu et al. (2009)
  Isovitexin Apigenin 6-C-glucoside Leaves Fu et al. (2007)
  Apigenin-6,8-di-C-α-ι-arabinopyranoside   Leaves Wei et al. (2013b)
  Luteolin 5,7, 3′,4′-tetrahydroxyflavone Leaves Fu et al. (2008); Fu et al. (2006); Wei et al. (2013b); Zu et al. (2006)
  Orientin Luteolin 8-C-glucoside Leaves Wei et al. (2013b); Wu et al. (2009)
Isoflavones Biochanin A 5,7-Dihydroxy-4′-methoxyisoflavone Leaves & roots Duker-Eshun et al. (2004); Wei et al. (2013a)
  Cajanin 5, 2′,4′-Trihydroxy-7-methoxyisoflavone Seed & etiolated stems Dahiya et al. (1984); Ingham (1976) Dahiya (1987)
  4′-O-methylcajanin 5,2′-dihydroxy-7,4′dimethoxyisoflavone Etiolated stems Ingham (1976)
  Cajaisoflavone   Root bark Bhanumati et al. (1979a)
  Formononentin 7-hydroxy-4′methoxyisoflavone Etiolated stems & leaves Ingham (1976); Wei et al. (2013a)
  Genistein 5,7,4′-trihydroxyisoflavone Roots/root bark & etiolated stems Bhanumati et al. (1979b); Duker-Eshun et al. (2004); Ingham (1976)
  2′-Hydroxygenistein 5,7,2′,4′-tetrahydroxyisoflavone Roots, etiolated stems Duker-Eshun et al. (2004) Ingham (1976)
  Isogenistein 7-glucoside 5,7,2′-trihydroxyisoflavone 7-0-β-D-glucoside Root bark Bhanumati et al. (1979b)
Flavonols Quercetin 3,5,7,3′,4′-pentahydroxyflavone Leaves & pod surface Green et al. (2003); Zu et al. (2006)
  Isoquercitrin Quercetin 3-β-D-glucoside Pod surface Green et al. (2003)
  3-O-Methylquercetin 5,7,3′,4′ -Tetrahydroxy-3-methoxyflavone Pod surface Green et al. (2003)
  Isorhamnetin  3′-Methoxyquercetin Leaves Zu et al. (2006)
Anthocyanidins Chrysanthemin Cyanidin 3-glucoside Location not reported Lai et al. (2012)
  Peonidin 3-glucoside   Location not reported Lai et al. (2012)
Flavanones Cajaflavanone   Root & root bark Dahiya (1991); Bhanumati et al. (1978)
  Naringenin 5,7,4′-trihydroxyflavanone Leaves Wei et al. (2013b)
  Pinostrobin 5-hydroxy-7-methoxyflavanone Leaves Wei et al. (2013a); Wei et al. (2013b); Wu et al. (2009); Ashidi et al. (2010); Duker-Eshun et al. (2004); Kong et al. (2010); Nicholson et al. (2010)
Isoflavanone Cajanol 5,4′-dihydroxy-7,2′-dimethoxyisoflavanone Roots, stem/etiolated stems, leaves & seed Wei et al. (2013a); Liu et al. (2011); Luo et al. (2010); Dahiya et al. (1984); Duker-Eshun et al. (2004); Marley and Hillocks (2002); Ingham (1979, 1976) Dahiya (1987)
  Cajanone   Roots Dahiya (1991); Preston (1977)
  2′-O-Methylcajanone   Root bark Bhanumanti et al. (1979)
Chalcone Pinostrobin chalcone 2′,6′-Dihydroxy-4′-methoxychalcone Leaves Cooksey et al. (1982); Wei et al. (2013b)