216 



Glucosides. 



489. JALAPIN. C 31 H 30 16 . 



a. Powder. 



Note. This glucoside is insoluble in ether. It is resolvable into crys- 

 tallizable jalapinol and glucose. 



490. MECONIN. C 10 H 10 4 . (Opianyl.) 



a. Small prismatic crystals. 



&. A magnificent specimen crystallized in a glass basin. 

 Note. Specimen b was presented by Messrs. Morson & Son. 



491. PHLORIDZIN. C 21 H^ 10 , 2 H 2 0. 



a. Silky crystals. 



Note. Obtained from the root bark of apple and cherry trees. It is 

 resolvable into phloretin and glucose. 



492. PICROTOXIN. C 12 H 14 5 . 



a. Crystalline powder. 



Note. This substance reduces cupric oxide like the sugars, but to a 

 much smaller extent. Pharmacographia, p: 31. Its constitution not 

 having been as yet satisfactorily ascertained, it is placed among the 

 glucosides for convenience only. 



493. PIPERIN. C 5 H IO N, C 12 H 9 3 . 



a. Yellowish crystals. 



Note. This substance is sometimes considered as a weak alkaloid, but 

 it has no action on litmus paper, and does not unite directly with acids. 

 It has the constitution of a piperate of piperidia. See P. J. [3] , vol. vi., 

 p. 315. 



494. SALICIN. C 13 H 18 7 . 



a. Crystalline powder. 

 &. Saligenin. 



Note. Salicin is resolvable into saligenin and glucose. Saligenin is a 

 . . diatomic phenol-alcohol; Bee p. 211. 



495. SAMADERIN. 



a. Deliquescent yellowish, powder. 



Note. This specimen was presented by Dr. De Vrij, who obtained it 

 from the bark of Samadera indica, Gsertn. He supposes it to be a gluco- 

 side. Its formula is not yet ascertained. See P. J. [3], vol. ii., p. 645. 

 Examined by Mr. Hutchinson, student in the laboratory, its solution 

 proved neutral to test paper, and yielded no precipitate with perchloride 

 of platinum, iodohydrargyrate of potassium, or biniodide of potassium, 

 but a granular precipitate with perchloride of gold, and a light yellow one 

 with phosphomolybdic acid. Fehling's copper solution was not precipi- 

 tated by it unless it had been previously boiled with an acid. 



496. SANTONIN. C 15 H 18 3 . 



a. Small crystalline scales. 



Note. Santonin is resolvable into santoniretin and glucose. See 

 Pharmacographia, p. 349 ; Attfield, Chemistry, p. 472. 



