| 释义 |
‖ dita|ˈdiːtə|
[The native name.]
The bark of a forest tree found in the Philippine Islands, Echites (Alstonia) scholaris. Usually dita-bark.
1876Pharmaceut. Jrnl. Ser. iii. VI. 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. Ibid. 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. 1879Watts 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.
Hence ditamine |ˈdɪtəmaɪn|, ditaine |ˈdɪteɪaɪn|, Chem. [see amine, -ine], the characteristic amine or alkaloid of dita-bark, C16H19NO2.
1876Pharmaceut. Jrnl. Ser. iii. VI. 143 Ditain was prepared by Gruppe in a manner similar to that in which quinine is prepared. 1879Watts 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. Ibid., Ditamine is easily soluble in ether [etc.]. |