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Chemistry of Natural Compounds - The quantitative amounts of the essential oil of the European white birch of the Yakut population in the annual cycle and its component composition have been...  相似文献   
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Summary Dihydroquercetin, quercetin, (+)-catechin, and protocatechuic, vanillic, p-coumaric, caffeic, and ferulic acids have been isolated from an ethereal extract of the bark ofPinus sibirica.Forest and Timber Institute, Siberian Branch, Academy of Sciences of the USSR. Institute of Plant Physiology, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 15–17, January, 1971.  相似文献   
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