Anthraquinone compounds in C. fistula comprise of
both anthraquinone aglycones and anthraquinone
glycosides, but only anthraquinone glucosides are
active laxative property8-10). The contents of total
anthraquinones (total aglycones + total glycosides) and
total anthraquinone glycosides are shown in table 4.
The highest content of total anthraquinone glycosides,
both calculated as rhien and aloe-emodin, was obtained
in the extract prepared by decoction method while the
highest content of total anthraquinones was found the
maceration extract. Anyhow, the contents of total
anthraquinones in the extracts prepared by percolation,
soxhlet extraction and maceration were not much