英语词汇“helenin”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	helenin
释义	helenin Chem.\|ˈhɛlɪnɪn\| [f. botanical name Helen-ium + -in.] A colourless crystalline substance (C₆H₈O) obtained from the root of elecampane (Inula Helenium). 1838T. Thomson Chem. Org. Bodies 498 When the root of elecampane is distilled, the helenin passes with the water under the form of a yellowish oil.1886Syd. Soc. Lex. s.v., According to Valenzuela, helenin is very useful in bronchitis. Hence ˈhelenene, a yellow oily hydrocarbon obtained by distilling helenin with phosphoric anhydride (Watts Dict. Chem. 1865).
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