T.K. Razdan

Chromones and coumarins from Skimmia laureola

Abstract The isolation and characterisation ofchromones and coumarins, including the new chromone, skimminin, from S. laureola is reported.

Steroids, chromone and coumarins from Angelica officinalis

Abstract From the ethyl acetate extract of the fresh roots of Angelica officinalis var. himaliaca , besides sitosterol, pregnenolone, peucenin-7-methyl ether, osthol and 18 furanocoumarins have been characterized by spectroscopic methods, including 13 C NMR, and some chemical transformations.

Sesquiterpene esters sesquiterpene-coumarin ethers from Ferula jaeskeana

Abstract Five new sesquiterpene esters, together with the known esters of jaeskeanadiol, were isolated and characterized from the roots of Ferula jaeskeana . Two sesquiterpene-coumarin ethers were isolated for the first time from this plant.

Koelpinin-A, B and C — three triterpenoids from Koelpinia linearis

Three new triterpenoids, designated as koelpinin-A, B and C and characterised as 28-nor-lup-12,17-dien-3 beta,16 alpha-diol,3 beta-acetoxy-28-nor-lup-12,17-dien-16 alpha-ol and 28-nor-lup-12,17-dien-3 beta-ol-16-one, respectively, together with 30-nor-lup-3 beta-ol-20-one, taraxeryl acetate and germanicol, were isolated, from the aerial parts of Koelpinia linearis. 13C-NMR shifts were assigned after performing APT and DEPT experiments.

Sterones, iridoids and a sesquiterpene from Verbascum thapsus

Abstract An unusual sterone distribution has been found in V. thapsus . Also two iridoid glycosides and a sesquiterpene acid have been isolated and characterized from the plant.

Lupene derivatives from Skimmia laureola

Abstract Three new lupenes, isolated from Skimmia laureola , have been characterized as 23-acetoxy-lup-20(29)-en-30-al-3-one, 3β,23-bisacetoxy-lup-20(29)-e

Two isoflavones from Iris kashmiriana

Abstract 3′-Hydroxy- and 4′-hydroxy-5,5′-dimethoxy-6,7-methylene-dioxyisoflavones were identified in the rhizomes of Iris kashmiriana .

Unusual homologous long-chain alkanoic acid esters of lupeol from Koelpinia linearis

Abstract An unusual series of five long-chain alkanoic acid (C 14 C 18 ) esters of lupeol was isolated from the methanol extract of koelpinia linearis and characterized by chemical and spectroscopic methods, including 13 C NMR. The spectral assignments were achieved by APT and DEPT techniques.

Isocladrastin and kashmigenin—two isoflavones from Iris kashmiriana

Abstract From the rhizomes of the Iris kashmiriana , two new isoflavones, isocladrastin and kashmigenin, were characterized as 3′-hydroxy-6,7-4′-trimethoxy-isoflavone and 4′-hydroxy-3′,5′-dimethoxy-6,7-methylenedioxy-isoflavone, respectively. Also, junipegenin-B has been found present in this plant species.

Further triterpenoids and 13C NMR spectra of oleanane derivatives from Phytolacca acinosa

Abstract In addition to five known triterpenoids, namely acinosolic acid, phytolaccagenin, phytolaccagenic acid, esculentic acid and jaligonic acid, three new oleanane derivatives, designated as phytolaccagenin A, acinosolic acid A and acinosolic acid B, have been isolated and characterized from the defatted berries of Phytolacca acinosa. The new compounds have been identified as 3β-acetoxy-3β-methyloleanate-12-en-2β,23α-diol-28β-oic acid, 3β-acetoxy-28β-methyloleanate-12-en-2β-ol-30β-oic acid and 2β-acetoxy-28β-methyloleanate-12-en-3β-ol-30β-oic acid, respectively.