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A new triterpenoid glycoside has been isolated from the stems of Calotropis procera and characterized as 3-O-α-L-rhamno-pyranosyl (1-2)-β-D-glucopyranosyl-3β-hydroxyolean-12-en-28-oic acid-28-O-β-D-xylopyranoside by spectral and chemical studies.

From the stem of CaLotropis procera, olean-12-en-28 oic acid-3-0-a-L-rhamnopyranosyl (J~2) ~-D-glucopyranosyl ( I ~2) !)-D-galactopyranoside 1 and 3-0{ ~D-glucopyranosyl (J ~2)-!)D-glucopyranosyl (J ~6)-~D-glucopyranosyl ( 1~3)-aL-arabinopyranoside) olean-12-en-28-0-~D-glucopyranosyl 2 have been isolated. Their structures have 'been elucidated on the basis of spectral data and by chemical methods.

Plumbago zeylanica Linn (Fam. Plumbaginaceae) known as "ch itrak" is a useful medicinal plane. Its roots are used to improve digestion, also used in piles, anasarca, diarrhoea and skin di seases• Earlier work recorded the presence of plumbagin, ./3-sitosterol, droserone, zey lanone and ellipt inone• The benzene-ethyl acetate fraction of .the roots of this plant on repeated column chromatography yielded compound 1 as yell ow crystals, mp, 230°C and droserone 2 as orange needles, mp 179°C and reddish brown crystals of zeylanone 3 m.p. 21 0°C. Identification of droserone 2 and zeylanone 3 was done by comparison of their spectral data with those given in li terature.