Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn.
- Sohn, Charles E.
- Date:
- 1894
Licence: Public Domain Mark
Credit: Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![§ 147. MARRUBIUM vulgare (Horehound) ; LabiaUv. The whole planf. Investigators : Kromayer and Harms, Archiv. Pharm., vols. 83, 108, 116. Harms obtained 2 grammes of Marrubiin from 25 lb. of the plant. MARUBIIN B. ; crys. needles (from cold alcohol) ; M.P. 148° (Harms), or 160° (Kromayer) ; neutral reaction, bitter. Soluble in alcohol, ether, chloroform, slightly in water, not in petroleum spirit. Removed by ether from aqueous solution. Absorbed by charcoal. Not precipitated by lead acetate, neutral or basic (to alcoholic solution), nor by alkaloid reagents. Fehling's solution, not reduced. No colour reactions with acids (concentrated sulphuric acid, brownish- yellow—Kromayer). § 148. MEGARRHIZA Californica (Ecbinocystis) ; Cucurbitacece. Investigator : Heaney, Amer. J. Ph., 48, 451. (a) MEGARRHIZIN G. ; poisonous. Acids give sugar and Megar- rhizionetzn. Soluble in alcohol, not in ether. (b) MEGARRHIN, resembles Saponin ; enlarges pupil. (c) MEGARRHIZITIN B. ; crystalline, poisonous. § 149. MENYANTHES trifoliata (Buckbean) ; Gentianaeea. In- vestigators : Kromayer, Archiv Ph., 1861 ; Lendrich, idem, 230, 38. MENYANTHIN G., C30H46O14 (Kromayer) or C33H50O14 (Lendrich) ; amorphous, terebinthinate becoming gradually solid ; M.P. 100°-115° ; neutral reaction, bitter. Acids convert to Menyanthol, C8H80 (Hi'ise- mann), or C7HnOo (Lendrich), with characteristic odour, and a lajvo- rotatory sugar. Soluble in hot water (with difficulty cold), in alcohol, chloroform, benzene ; not in ether. Removed from acid solutions by benzene and chloroform ; absorbed by charcoal. Precipitants : [Not lead acetate, neutral or basic, or mere cloud.] Tannic acid, white. [Not gold chloride, but reduction on warming.] Ammoniacal silver nitrate, reduced. Fehling's solution, reduced. Phospho-molybdic acid, yellow. Bismuth-potassic iodide, yellow. Mercuric-potassic iodide, white. Iodine solution, yellow. I Colour tests, etc. : Concentrated sulphuric acid, yellowish-brown changing to violet. Dilute sulphuric acid on warming, odour of Menyanthol. § 150. MIKANIA Guaco ; Composite. The leaves. Investigators : Fa'ure, Journ. Pharm., [2] 22, 291 ; Pettenkofer, Report. Ph., 86, 311. Used in America against snake-poisoning, etc. GUACIN B. ; light brown amorphous powder ; M.P. 100° ; neutral, bitter. Soluble in hot water (difficultly cold), in alcohol, and in ether. Colour tests: Concentrated sulphuric acid, dissolves reddish-brown. ,, nitric acid, dissolves dark yellow. „ hydrochloric acid, little change. § 151. MORINDA citrifolia (Rubiacece) contains Morindin, a glucoside I yielding sugar, and Morin don, a colouring matter. Morindin resembles Ruberythric acid (from Rubia tinctoria or Madder), the glucoside of Alizarin (Dihydroxi-anthraquinone). § 152. MORRENIA brachystephana (tasis) ; Palmacecz; Argentine Republic. The root. MORRENINE A. ; dark, brown amorphous; M.P. 100° ; bitter taste, sharp odour. Soluble in water, alcohol, amyl alcohol, chloroform. ' Precipitated by most alkaloid reagents.' § 153. NANDINA domestica ; Berberidacew. The root bark. NANDININE A., C1S)H]9N04; amorphous powder ; poisonous. Salts amor- phous. Soluble in alcohol, ether, chloroform, benzene ; not in water. Alkaline hydrates, dissolve (acids re-precipitate). Platinum chloride, whitish-yellow pp. Concentrated sulphuric acid containing nitric acid, blue solution. § 154. NARTHECIUM ossifragum ; Juncacece. Investigator ■ Walz. N. Jahrb. Ph., 14, 345. NARTHECIN B.; crystalline ; M.P. 35° ; acid reaction, biting taste. | Soluble in alcohol, scarcely in water.](https://iiif.wellcomecollection.org/image/b21503023_0076.jp2/full/800%2C/0/default.jpg)
