单词 | dita |
释义 | ditan. The bark of a forest tree found in the Philippine Islands, Echites (Alstonia) scholaris. Usually dita-bark n. ΚΠ 1876 Pharm. Jrnl. & Trans. 6 142 Under the name ‘Dita’ the natives of the Philippines indicate the bark of the Echites scholaris, Linn. (Alstonia scholaris, Brown.), a stately forest tree. 1876 Pharm. Jrnl. & Trans. 6 142 The fame of dita bark as a remedy is of old standing, since in 1678 it was mentioned by Rheede and afterwards in 1741 by Rumphius. 1879 H. Watts Dict. Chem. VIII. 688 Dita bark usually consists of irregular curved fragments from 40 to 60 mm. long, 15 mm. wide and 1 mm. thick, covered externally with a thin leather-coloured cortical layer. Derivatives ditaine n. /ˈdɪteɪaɪn/ Chemistry the characteristic amine or alkaloid of dita-bark, C16H19NO2. ΚΠ 1876 Pharm. Jrnl. & Trans. 6 143 Ditain was prepared by Gruppe in a manner similar to that in which quinine is prepared. 1879 H. Watts Dict. Chem. VIII. 688 Gorup-Besanez afterwards extracted from ditaïn a crystallisable substance which proved to be an alkaloïd, but which..he did not completely examine. ditamine n. /ˈdɪtəmaɪn/ [see amine n., -ine suffix1] Chemistry ΚΠ 1879 H. Watts Dict. Chem. VIII. 688 Ditamine is easily soluble in ether [etc.]. This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2019). < n.1876 |
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