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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/037/06/0718-0729

    • Keywords

       

      Quercetin; Flavonol; Isoquercitrin; Mixed Melting Point; Lead Salt

    • Abstract

       

      Fresh flowers are found to be much more satisfactory for getting a true picture of the flavonoid composition than dried ones. The following fresh flowers have now been examined. (1)T. neriifolia.—The flowers contain a mixture of quercetin (5 parts) and kæmpferol (1 part) present mainly as their glycosides. (2)Cambodia cotton flowers.—These contain almost entirely quercetin most of which is present as quercimeritrin and a very small amount is possibly as isoquercitrin. (3)T. erecta.—This contains only quercetagetin in the form of its glycoside. (4)H. vitifolius.—These contain mainly gossypetin as the 8-glucoside, gossypin, along with free quercetin in minor quantities. (5)H. esculentus.—This is similar toH. vitifolius except for the presence of large amount of impurities and seems to contain more of quercetin in the form of glycoside. (6)Yellow roses: (a) Marechel Neil and (b) Lady Hellingden (T.) are good sources of kæmpferol and contain quercetin as a very minor component. These are present as their glycosides.

    • Author Affiliations

       

      K S Pankajamani1 T R Seshadri1

      1. Department of Chemistry, Delhi University, Delhi, India
    • Dates

       
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