hiss aid a’ yet een eattinne Lacan that may oy 
means, whereas the d-stereomeride remains in the | iy 
after removing the pyridine, as.an amorphous mass. Both_am 
ae by ee of acetic anhydride and Bnd ss into. vader 
of, the.’ glucosides is cE obtained when performing the saponificalions ith " 
alcoholic ammonia. These preparations, WA aan not wie ou n 
called prulaurasine by means of very diluted cold, Bases: Yet it was. possible as 
up the mixture into its two components by crystallization. Cie ae 
Mandelonitrile glucoside has been first prepared by E. Fischer?) bee ee 
- lysis .of amygdaline with yeast extract. Fischer, too, gave then its structural | 
cee hitherto in use, and pointed out that it possibly occurred lees He i 
ey he termed ‘ sprileknusiie and found to be a bambee ious isomeride of peer: | 
glucoside. A short time before, Bourquelot and Danjou?) had prepared cryst 
Ties sambunigrine from elder leaves and considered it also an_ isomeride of mandelot 
' glucoside. Furthermore, Hérissey”*) found mandelonitrile glucoside in the fresh bra 
of Prunus Padus. Caldwell and Courtauld*) found about the same time, that man elo - 
nitrile glucoside is transformed into prulaurasine by means of very diluted aqueous 
| baryta or ammonia solution. They recognized clearly the relations existing bet ; 
eet. the three ce the oldest of which they termed quite correctly I-mandelo 
laurasine a “mixture of both. This view was confirmed by Bourguelot and Hers 
amido glucoside aaenaoee i that reaction. Bes ot 
Ba hay a 2) MO ae Soc. 91 (1907), 671: Repay October 190%).42-.15.0 2 2») B 
5 abe %) Journ. de Pharm. et Chim. VI. 28 (1906), 5; Report April 1906, 107. — 4) Journ 
(1905), 219, 385; Report April 1906, 105. — 5) Journ. de Pharm. et Chim. Vv 26 
245 (1907), 641; Report April 1908, 13. — °) Journ. chem. Soc. 91 (1907), Ret 
— ah Journ. de Pharm. et Chim. VI. 26 seed, Bs fsa October 1907, 12. Ne eae 
