SOLANACE Zi. 631 
It crystallizes in needles (from dilute alcohol), or prisms (from: 
CHCI5), is more soluble in water and dilute alcohol than 
atropine, and is levorotatory, {a],——21°. It enlarges the 
pupil of the eye in the same manner as atropine. 
Hyoscyamine occurs mixed with atropine in several plants of 
the Solanaceze, such as Datura, Duboisia, Atropa, and probably 
in some others, Ladenburg is of opinion that atropine is an 
_ optically inactive base standing to hyoscyamine in the relation 
_ of racemic acid to lwvotartaric acid. From 20 grams of com- 
‘mercially pure atropine aurochluride he isolated by recrystal- 
: lization one gram of hyoscyamine aurochloride, and to this he 
_ attributes the statement that atropine can be converted into 
hyos¢ Hyoscyamine is converted into atropine by heat- 
for 5or 6 hours above its melting point.. Its optical 
y may likewise be diminished by allowing its alcoholic 
| oscine or "amorphous oa C’H=?NO’, is a 
colourless syrupy fluid, and oceurs in the mother-liquor from 
ich hyoscyamine has crystallized. It closely resembles 
_hyoscyamine, both in its mydriatic action on the pupil and in 
ther respects. Boiled with water it splits up into tropic acid 
d pseudo-tropine. (Watt's Dict. of Chem, 2d.Ed.II., 744.) 
enbane seeds contain 26 per cent. of fatty oil, and according 
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