Gluco-alkaloid

When the juice of the fresh berries of the same plant was examined it yielded a gluco-alkaloid, m.p. 269-270° dec.), which appeared to be solauricine, m.p. 270° (dec.), but on hydrolysis it furnished a crude aglycone, m.p. 219-220°, which, after a long series of recrystallisations from a variety of solvents, gave a fraction of pure solasodine, m.p. 199-5-202°, and another of pure solauricidine,m.p. 213-7°. 

The major difference between the two gluco-alkaloids and also between the two aglycones, lies in their melting-points and those of their derivatives. For convenience of comparison these are summarised in the following table, which includes mixed melting-points to illustrate the difficulty met with in this series, that a mixture of two distinct members of the group may not show depression of melting-point. 

Anchusa officinalis L. Cynoglossine B. HCl, crystalline. Paralyses peripheral nerve terminations. Consolidine gluco-alkaloid hydrolysed to glucose and consolicine (also present as such). Paralyses the central nervous system. The same alkaloids are also present in Echium vulgare L. and Cynoglossum offikinale L. (Greiner, Arch. Pharm., 1900, 238, 505). 

Achillea spp. A. millefolium L. contains achilleine, amorphous hydrolysed to achUletine, CnHj,04N, also amorphous, ammonia and a reducing sugar. A. moschata contains achilleine and moschatine, CjiHjjOjN, an ill-defined gluco-alkaloid.2 ((1) Zanon, Annalen, 1846, 58, 21. (2) von Planta, ibid., 1870,... 

Ipomosa sidcefolia Choisy. The seeds, piule, contain a gluco-alkaloid with narcotic properties. (Santesson, Arch. Pharm., 1937, 275, 532.)... 

Tutin F, Clewer HWB (1914) Constituents of Solarium angustifolium isolation of a new gluco-alkaloid, solangustine. J Chem Soc Transact 105 559-576 Tuzson P, Kiss Z (1957) Alkaloids of Solarium. 11. Soladulcidine. Acta Chim Acad Sd Hungar 12 31-34... 

Irani has isolated from an alcoholic extract of kurchi seeds a crystalline gluco-alkaloid, which froths at 65°, melts at 200° (dec.), forms a benzoyl derivative and gjves a dark-green colour with ferric chloride. When a saturated solution of picric acid is added to an aqueous solution of the gluco-idkaloid hydrolysis occurs, the products t ing conessine picrate, a second piorate, m.p. 113-6°, and galactose. 

Arbain and coworkers [35] discovered unusual indole monoterpenoid gluco-alkaloid, characterized by a glucose moiety on the benzenoid ring. Recent studies reported an unusual oxindole alkaloid, macrophylUonium (1.23), pair of new tetracyclic oxindole alkaloids, macrophyllines A and B (1.24 and 1.25) with significant vasodilating activity [36]. 

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