The most important ingredients present in plant communities turn out to be alkaloids, terpenoids, steroids, phenols glycosides and tannins. Various chemical constituents mainly alkaloids, coumarins and steroids have been isolated and identified from different parts of Aegle marmelos tree such as leaves, bark and fruit.
Several chemical constituents have been isolated and from various parts of the bael tree. These include alkaloids, coumarins and steroids. The leaves contain skimianinc, sterol and aegelin. The active constituent of the fruit is marmorosin, which is identical to imperatorin. Older coumarins contained in the fruits are alto imperatorin and B sitosterol. Roots of the tree have been found to contain psoralin, xanthotoxin, scopoletin and tembamide. The phytochemical screening of the crude extract revealed the presence of alkaloids, cardiac glycosides, terpenoids, saponins, tannins, flavonoids, and steroids (1).
The bael fruit is highly nutritious. It contains water, protein, fat, minerals, carbohydrates, carotene, thiamine, riboflavin, and niacin. No other fruit has such a high content of riboflavin. Marmelosin is most probably the therapeutic active principle of bael fruits. In bael fruit, coumarins like alloimperatorin, imperatorin, and B-sitosterol have been identified.