Category:FL1

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Revision as of 10:54, 11 December 2009

Aurone, Auronol, Chalcone, and Dihydrochalcone


Flavonoid Top Molecule Index Author Index Journals Structure Search Food New Input

Upper classes : FL Flavonoid

Class
FL1A Aurone
Fl1a.png
FL1B Auronol
Fl1b.png
FL1C Chalcone
Fl1.png
FL1D Dihydrochalcone
Fl1d.png

Chalcones and aurones are called anthochlor (chlōros means yellow in Greek). When flowers with anthochlor are fumed with ammonia, they turn to red. Anthochlors are found in at least Caryophyllaceae, Compositae, Rosaceae, and Scrophulariaceae. Aurones are oxidized forms of chalcones and usually both exist together in yellow flowers. Chalcones, unlike aurones, occur sporadically in other parts of plants.


Carthamin (カルタミン)

The oldest known chalcone is from safflower (Carthamus tinctorius), a crimson dye that has long been used in India, Egypt, Japan, and other countries. Major pigments in safflower are water-soluble Safflor yellow A, Safflomin A, Safflomin B and Safflomin C (60%). On the other hand, red Carthamin, which is water-insoluble, is only less than 1%. The structure of Carthamin, two chalcones connected by a methine group, was identified by Onodera et al. in 1979. (This is why we do not have Carthamin in this database, which collects only chalcone monomers. The same is true for Safflomin B, whose structure is a coupling of two chalcones.)

  • Obara H., Onodera J. "Structure of Carthamin", Chem. Lett 201-204, 1979
  • Obara H., Onodera J., Sato S. "Carthamin, the Red Pigment of Safflower" Bull. Yamagata Univ. 22(2), 1993 (in Japanese)


Database statistics データベース統計

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。

Subcategories

This category has the following 4 subcategories, out of 4 total.

F

  • [×] FL1A(empty)
  • [×] FL1B(empty)
  • [×] FL1C(empty)
  • [×] FL1D(empty)
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