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1. (Article ID: 10573)
 
Moon JH, Watanabe N, Sakata K, Yagi A, Ina K, Luo S
trans- and cis-linalool 3,6-oxide 6-O-β-D-xylopyranosyl-β-D-glucopyranosides isolated as aroma precursors from leaves for oolong tea
Bioscience, Biotechnology, and Biochemistry 58 (1994) 1742-1744
 

New glycosidic aroma precursors (1 and 2) of the main volatile constituents, trans- and cis-linalool 3,6-oxides (linalool oxides I and II), were isolated from oolong tea leaves (Camellia sinensis var. sinensis cv. Maoxie). The isolation was guided by an enzymatic hydrolysis with acetone powder prepared from fresh tea leaves (cv. Yabukita) followed by GC or GC-MS analyses. Chromatographic purification of hot water extracts of the tea leaves on active charcoal, Amberlite XAD-2, and Sephadex LH-20 columns as well as HPLC gave two new glycosides, trans- and cis-linalool 3,6-oxide 6-O-β-D-xylopyranosyl-β-D-glucopyranosides (1 and 2).

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2. (Article ID: 10798)
 
Ikeda Y, Fujii Y, Nakaya I, Yamazaki M
Quantitative HPLC analysis of cardiac glycosides in Digitalis purpurea leaves
Journal of Natural Products 58 (1995) 897-901
 

An analytical method for the determination of cardiac glycosides in Digitalis purpurea leaves by hplc was developed. Quantitation was carried out by the incorporation of lanatoside A as an internal standard. The present method is sufficiently precise and relatively simple.

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