Category:FL2F

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Flavanone


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Upper classes : FL Flavonoid : FL2 Flavanone

Contents

Overview

Not only Asteraceae and Fabaceae but also Lamiaceae and Rutaceae contain many flavanones. Aglycones occur as free state in bark, roots and root barks. In ferns, aglycones exist as farinose exudates of fronds. Two flavanone glycosides were also isolated from a liverwort Riccia. Butrin, glucoside of Butin, was the first flavanone identified in nature by Lal and Dutt (1935).


Major Plant Families

The number in each family is counted as the number of genera (not species) listed in our registered references. Each reference record is accessible by clicking the link in compound pages. The taxonomy follows the APG-II classification. For details (or if the figure is broken), visit this page.

各科のカウントは種名でなく文献に記載された属名の数です。文献は代謝物ページのリンクからたどれ、分類はAPG-IIです。左の図が表示されない場合はここをクリックしてください。

Patterns of Hydroxylation

The 5th and 6th digits of our flavonoid ID indicates the hydroxylation patterns of A-ring and B-ring (See the upper-right figure. The leftmost ring is A, rightmost is B), respectively. The following chart is spanned by these 2 digits. R indicates H or CH3, and R' indicates H or R. Numbers are IUPAC positions. The value in each cell (such as GS: glycosilation only) corresponds to the 7th and 8th digits, which is explained at the bottom of this page.


Details of the 3rd Class: Hydroxylation pattern of A and B rings (5th and 6th digits)

Position of -OH (-OCH3) groups
      6th digit →
5th digit ↓

FL A.png FL B.png FL C.png FL D.png FL E.png FL F.png FL G.png FL H.png FL I.png FL J.png FL K.png FL L.png FL 8.png FL 9.png
 A (209 pages)  B (34 pages)  C (120 pages)  D (23 pages)  E (17 pages)  F (6 pages)  G (11 pages)  H (1 pages)  I (2 pages)  J (0 pages)  K (2 pages)  L (86 pages)  8 (43 pages)  9 (140 pages)
FL A .png  A (441 pages)
FL B .png  B (26 pages)
FL C .png  C (29 pages)
FL D .png  D (6 pages)
FL E .png  E (42 pages)
FL F .png  F (35 pages)
FL G .png  G (13 pages)
FL 1 .png  1 (78 pages)
FL 2 .png  2 (7 pages)
FL 3 .png  3 (10 pages)
FL 4 .png  4 (1 pages)
FL 9 .png  9 (6 pages)

Abbreviations used in the above chart

First Characters 

N not glycosylated; G O-glycoside; C C-glycoside; D both glycosides;

Second Characters 

S not modified; M alkylated; I prenylated; R cyclic-prenylated; F furanoFL; P pyranoFL; D furano and pyranoFL; N phenylpropanoid; C others;

Special Second Character only for Anthycyanin (FL7) 

A Galactosylated; L Glucosylated; O modified with other sugars;

Other Unusual Patterns

These types are not classified in the above chart.

Quinone  QU (7 pages) alpha-Hydroxy  HX (0 pages) beta-Hydroxy  HY (4 pages) Peltogynoid  PT (0 pages)
Retrocalchone  RT (0 pages) Dehydro-backbone  WX (0 pages) Additional rings  RN (0 pages) Others  UN (0 pages)
Pyranoanthocyanin (FL7 only)  RX (0 pages)

Patterns of Glycosylation

The 7th and 8th digits of the flavonoid ID indicates the glycosylation, and other modification patterns, respectively. The following chart is spanned by these 2 digits. The value in each cell (such as AA for the standard form) corresponds to the 5th and 6th digits.


Details of the 4th Class: Glycosylation patterns (7th and 8th digits)
      7th digit →
8th digit ↓
No glycosylation  N (534 pages) O-glycoside  G (164 pages) C-glycoside  C (7 pages) O- & C-glycoside  D (0 pages)
no modification  S (283 pages)
alkylated  M (57 pages)
prenylated  I (0 pages)
cyclic prenylated  R (0 pages)
furano FL  F (27 pages)
pyrano FL  P (93 pages)
furano & pyrano FL  D (0 pages)
prenylpropanoid  N (11 pages)
others  C (36 pages)
3-Gal related A N.A. N.A. N.A.
3-Glc related L N.A. N.A. N.A.
other sugar at 3 O N.A. N.A. N.A.

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