| 释义 |
conˈvolvulin Chem.
[f. convolvul-us + -in.]
A glucoside, a colourless transparent resin, C31H50O16, obtained from the rhizome of Convolvulus Schiedanus, the officinal jalap-root.
Hence convolvuˈlinic acid, C31H54O18, a product of the action of fixed alkalis upon convolvulin. conˈvolvulinol, a crystallizable substance, obtained from convolvulinic acid. convolvuliˈnolic acid, an acid formed by the action of alkaline solutions on convolvulinol.
1850Pereira Mat. Med. 1455 Convolvulin, a substance supposed by Maquart to be a vegetable alkali. 1877Watts Fownes' Chem. II. 605 Convolvulin..is a gummy mass having a strong purgative action; resolved by acids and by emulsion into dextrose and convolvulinol, which is converted by alkalis into convolvulinolic acid. |
