Phytochemistry Letters 4 (2011) 109–112
Bharangin (1) analogues, bharangi-g-lactone (2) and bharangi-d-lactone (3) were isolated from the ethyl
acetate extract of the root nodules of the indigenous medicinal plant Pygmacopremna herbacea (Roxb.)
Moldenke (Gantubharangi). Compound 3 was also prepared from bharangin by treating with 2 N KOH in
methanol at room temperature. The structures of the compounds were established by means of spectral
data analysis, including high field 2D NMR studies.