K. S. Mukherjee

Diterpenoid quinones of Salvia lanata

Abstract The petrol extract of the whole plant (aerial parts and roots) of Salvia lanata yielded three diterpenoid quinones of the royleanone type, identifi

A methylenedioxy flavone from Limnophila indica

Abstract The petrol extract of the aerial parts and roots of Limnophila indica yielded a new flavone, 5-hydroxy-6,8-dimethoxy-3′,4′-methylenedioxyflavone, characterized by spectral studies.

A triterpene acid constituent of Salvia lanata

Abstract The petrol extract of the whole plant (aerial parts and roots) of Salvia lanata yielded a new triterpene acid, 3-epi-ursolic acid.

A triterpenoid of Andrachne cordifolia

Abstract The petrol extract of the aerial parts and roots of Andrachne cordifolia yielded a new triterpene, glut-5(10)-en-1β-ol.

A new xanthone from Hoppea fastigiata

AbstractFrom a chloroform extract derived from the aerial parts and roots of Hoppea fastigiata, a new xanthone derivative was isolated and its structure was established as l,5-dihydroxy-3,7-dimethoxy-xanthone.

1,5,7-Trihydroxy-3-methoxyxanthone from Hoppea fastigiata

Abstract The benzene whole plant extract of Hoppea fastigiata yielded a new xanthone, 1,5,7-trihydroxy-3-methoxyxanthone.

1,7-Dihydroxy-3,5-dimethoxyxanthone from Hoppea fastigiata

AbstractThe petroleum ether (60-80°) extract of the whole plants (aerial parts and roots) of Hoppea fastigiata yielded a new xanthone, 1,7-dihydroxy-3,5-dimethoxyxanthone.Hoppeu fustigiutu Clarke (Gentianaceae) (1) was collected from Santiniketan and identified. The plants are used by tribes for a variety of ailments and apparently have not been investigated previously. In continuation of our studies on plant pigments (2-6), we now report the isolation and structure elucidation of a new xanthone, 1,7-dihydroxy-3,5-dimethoxyxanthone from the aerial parts and roots of this species. This substitution pattern is extremely uncommon in xanthones and is reported previously by Rama Rao et al. (7).

5-Hydroxy-7,8,2′,4′-tetramethoxyflavone from Limnophila rugosa

Abstract The petrol extract of the aerial parts and roots of Limnophila rugosa yielded a new flavone, 5-hydroxy-7,8,2′,4′-tetramethoxyflavone.

A new flavonoid from Limnophila rugosa.

A minor flavonoid constituent of Limnophila rugosa has been isolated from its petrol extract and identified as 5,7-dihydroxy-8,3,5-trimethoxyflavone (1).

Triterpene from Limnophila heterophylla

The petrol extract of the aerial parts and roots of Limnophila heterophylla yielded a new triterpene, methyl-olean-12-ene-3α-benzoyloxy-29-carboxylate.