An Introduction to Chemical Pharmacology; Pharmacodynamics in Relation to Chemistry - Softcover
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ...Kiliani hydrolysis into digitalose, digitaligenin, and dextrose: C36H66O14 = C6HO6 + CyHOg + C22H30O3 dextrose digitalose digitaligenin Digitonin, C66H94O28 or C64H92028. This is a saponin, soluble in alcohol from which it crystallizes in fine needles m.p. 235C. On hydrolyses: C66H940282H20 = C3iH6oO6 + 2C6Hi206 + 2C6Hi20ij digitonin digitogenin dextrose galactose The commercial digitalins are impure and variable mixtures of digitalis principles. Convallamarin, C23H44O12, and convallarin, C34H.62011, are two glucosides occurring in convallaria majalis (lily-of-the-valley). Convallamarin is soluble in water and alcohol, insoluble in ether and chloroform, is an acrid glucoside, soluble in water, sparingly soluble in alcohol, and insoluble in ether and is a saponin-like glucoside. Little is known of the split products of these glucosides. Digitalein, C22H38O9, was supposed by Schmiedeberg to be a pure product but is not now considered a chemical entity. The same is true of digitophyllin. Glycyrrhizin, C44B.63NO18, is the sweet principle of licorice root. It occurs as the ammonium salt of glycyrrhizic acid, C44H62(NH)4NO18, and on hydrolysis it yields glycyrrhetin, C32H47N04, and para saccharic acid, C6H10O8. This acid reduces Fehling's solution and for this reason glycyrrhizin was formerly thought to be a glucoside. Scillin, from squill, is a mixture of glucosides, the chemistry of which is unknown. Helleborin, C36H4206, is found in black hellebore. On hydrolysis it gives helleboresin, C30H3804, and sugar. Helleborein, C26H44OH, is another glucoside obtained from the same source. On hydrolysis it yields helleboretin, C14H20O3, and sugar. CYANOGENETIC GLUCOSIDES The cyanogenetic glucosides yield hydrocyanic acid on hydrolysis. They are of interest chiefly becau...
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- PublisherRarebooksclub.com
- Publication date2012
- ISBN 10 1235925528
- ISBN 13 9781235925528
- BindingPaperback
- Number of pages110
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