Abstract The volatile oil obtained by hydrodistillation from the leaf of Eclipta indica L. was analyzed for its constituents by means of GC and GC/MS. 2-Tridecanone (89.7%), a straight chain ketone, was the singly most abundant constituent. Caryophyllene oxide (3.9%) and Î²-caryophyllene (2.6%) were the other compounds occurring in sizeable proportions.