... The bioactive constituents viz; 2-allyl-5-ethoxy-4-methoxyphenol, 4-terpineol, lysidine, epieudesmin, spathulenol, furylethyl ketone, borneol, nonanoic acid, 2,2,5,5tetramethyl-3-hexanol, galgravin, bornyl acetate, retusin, (9E,12E,15E)-9,12,15-octadecatrien-1-ol, geranylacetate, butyl butanoate, sakuranin, camphor, acetic acid, isoelemicin, acetaphenone, α-ursolic acid, dehydroabietic acid, methyl ether, isoeugenol, apigenin 4,7-dimethylether, linalool, dehydro di-isoeugenol, elemicin and linolenic acid, 1 β,7 α(H)cadinane-4 α,6 α,10 α-triol (1), 1 α,5 β -guaiane-10 α-O-ethyl-4 β,6 β-diol (2), and 6 β,7 β(H)-cadinane-1 α,4 α, 10 α-triol (3) have been reported in A. calamus because of its rich ethnobotanical history and traditional uses against various ailments like, fever, asthma, bronchitis, cough and mainly for digestive problems such as gas, bloating, colic, and poor digestive function. The herb has also been reported to be used in Ayurveda and Unani systems of medicine [5][6][7][8] . To verify and characterise the variation of A. calamus oils and to identify the various possible chemotypes in the populations of A. calamus, their compositions were determined by cluster analysis, as shown in (Fig. 2). ...