Pectins from the peel ofCitrus unshiu

The carbohydrate composition of tangarine peel is studied. Water-soluble carbohydrates, pectins, are isolated. Their physicochemical properties are determined. Regulation of the degree of esterification is examined. Presented at the Third International Symposium on the Chemistry of Natural Compounds, Bukhara, 1998. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 570–572, September–October, 1999.     

Flavonoids of the peel of the fruit ofCitrus unshiu

Institute of Biochemistry, Academy of Sciences of the Georgian Republic, Tbilisi, and Samara Medical Institute, Russia. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 821–822, November–December, 1994.     

Essential oils of the inflorescences and leaves ofZiziphora brevicalyx

V. L. Komarov Botanical Institute, Academy of Sciences of the USSR, Leningrad. Leningrad State University. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 122–123, January–February, 1990.     

Essential oils Constituents of the leaves of Amomum gagnepainii and Amomum repoense

The chemical constituents identified in the essential oils hydrodistilled from the leaves of Amomum gagnepainii T.L.Wu, K.Larsen and Turland and Amomum repoense Pierre ex Gagnep (Zingiberaceae) of Vietnam origin are reported. The chemical analyses were performed by means of gas chromatography–flame ionisation detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC-MS). The main compounds of A. gagnepainii were farnesyl acetate (18.5%), zerumbone (16.4%) and β-caryophyllene (10.5%). On the other hand, Amomum repoense comprised of monoterpenes dominated by β-pinene (33.5%), (E)-β-ocimene (9.6%), γ-terpinene (9.1%) and α-pinene (8.4%). This is the first report on the essential oils of A. gagnepainii and A. repoense grown in Vietnam or elsewhere.     

Essential oils of mongolian plants

1. The following compounds have been isolated by gas-liquid chromatography from the essential oil ofArtemisia rutifolia Steph. ex Spreng. growing in the Mongolian People's Republic and have been identified by their IR spectra: 1,8-cineole (35%), α-thujone andβ-thujone (11%), (+)-camphor (18%), (−)-α-terpineol (5%), and (−)-terpinen-4-ol (7%). By analytical gas chromatography α-pinene,β-pinene, camphene, limonene,β-phellandrene, and p-cymene have been identified in the hydrocarbon fraction. It has been shown that apart from compounds of a terpene nature the oil contains 4-phenylbutan-2-one, (±)-4-phenyl-butan-2-ol, and (±)-4-phenylbut-2-yl acetate. This is the first time that (±)-4-phenylbutan-2-ol and its acetate has been found in plant material.     

Essential oils of Pimpinella aromatica

V. L. Komarov Institute of Botany, Academy of Sciences of the Azerbaidzhan SSR, Baku. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 288–291, March–April, 1991.