Qualitative and quantitative analysis of biologically active principles ...

in one of the Dasamoola plant, Premna integrifolia (Gokani et al.,
2007; Dasgupta et al., 1984). Considering the presence of luteolin
in a number of plants, qualitative analysis as well biological
property studies were carried out in the allied species of Premna
serratifolia (Figure 3).
The phototoxic phytoalexin, psoralen an effective ingredient
originally extracted from the Chinese herb, Psoralea corylifolia L., is
used to increase melanin in the skin. It is also used in the
treatment of vitiligo, bald patches of hair and psoriasis. Recent
studies reported that psoralen induces interstrand cross links in
DNA when activated by UV light (Ashwood­Smith et al., 1980). The
presence of psoralen content in Aegle marmelos has been reported
recently (Dhalwal et al., 2007; 2008).
Figure 1. Structure of baicalein
Figure 2. Structure of luteolin
Figure 3. Structure of psoralen
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