52 



DICTKlNAliV 01- TllK ACTIVi: PK [NCIl'LES OK PLANTS. 



Colour tests : 



Coucenlrated sulphuric acid with 1 water, reddish-violet in presence 



of ether. 

 Concentrated sulphnric acid with sugar, red, then brown. 

 Frohde's reagent, violet->/>.blue. 

 (d) CORNUTINE A. : only stable when combined with acid. Tlieacjueoua 

 solution decorapose.s. 

 Soluble in alcohol. 



f) '.in. ERYTHREA Centaureum (Common Centaury), E. chilensis 

 (Chironia chilensis), Sabattia vulgaris (Chironia angularis) ; Cli'ntiiiiiacew. 

 Investigators : Mrhu, Jinirn. de Pliarm., [4], 3, 'id.'), etc. ; al.so /-"//. ./., 

 Trans., [?>]. 1, illlO ; Lendrich, and others. 



((() ERYTHROCENTAURIN G., C.;;H„_,Og ? (C,,H,40„, Lendrich) ; crystalline 

 needles (ainiirphous, tercbinthiiiate, Lendrich) ; M.P. 13(V ; neutral 

 reaction, bitter :' (tasteless, M('hu). Reddened by light, but colourless ou 

 resolution ; not fluorescent. 



Soluble in l.firiO parts cold water or 3.T boiling, in 48 of 8G per cent. 



alcohol, i:'ij chloroform, 24.') etber, and in benzene, carbon bi.sulphide, fatty 



and essential oils. 



. Reactions : 



Alkaline hydrates) ,. , 

 , . ■' dissolve. 



Ammonia j 



Xo pp. lead acetate, neutral or basic. 



Nor tannic acid, Miihu (pp., Dragendorff). 



iVo pp. metallic salts. 



Not affected by bromine. 



Potass, permanganate, reduced. 

 No colours or effect with concentrated sulphuric, nitric, or other acids 

 — even chromic. 



Solution in .sulphuric acid gives odour of Menyanthol on warming. 



§ 9'J. ERYTHROPHKEUM guinense (Sassy tree. Doom or Ordeal 

 bark) ; Lnjiniiiiioxa'. Investigators : Gallois and Hardy, I'liarm. J. Trans., 

 P],7,77.' 



ERYTHROPHLdlNE \. (the 'Muawine' from 'Muawi ' ?) ; crystalline, 

 alkaline, poisonous (acts on heart). Crystalline salts. 



Soluble in water, alcohol, acetic ether, and carbon bisulphide : with 

 difficulty in ether, chloroform, or benzene. 



Removed from aqueous solution by acetic ether. 



lodo-potafsic iodide, yellowifh- 



red. 

 IJismuth potassic iodide, yellow. 

 Cadmium potassic iodide i 

 Mercuric-potassic iodide -white. 

 Mercuric chloride ) 



Precipitants : 



Alkaline hydrates, white. 

 Ammonia, white crystalline. 

 Oold chlcride, white. 

 Potass, bichromate, yellow. 

 Phospho-molybdic acid, dirty 

 green. 



Colour test : Concentrated sulphuric acid with permanganate, violet. 

 § 1(1(1. EUGENIA pimcnta (Myrtus cheken — yielding Cheken-leaves — 

 Allspice, pimento); Miirtactn. The leaves. Investigator: J. Winters 

 England, Amer. ./. 7V,., '1883, 24G. 



(a) CHEKENIN B. (Cheken bitter) : very bitter, unpleasant odour, not 

 poisonous. 



{b) CHEKENETIN, CjiHyOn + H.^O ; yellowish-green needles, giving green 

 solutions with alkalies, changing to bluish-violet and red. 



§ UH. EUONYMUS Europjcus (Spindle tree), E. atropuipureus 

 (Wahoo baik). Invistigator : A. 15. Pies cott, ^ mer. ./. Ph., 1883 and 1889. 

 EUONYMIN d. ; amorphous, bitter, odourless. 



Soluble in alcohol and petroleum ether, slightly in water and ether : 

 not in carbon bisulphide or benzene. 

 Precipitants (with alcoholic solution) : 

 Tannic acid, slight white pp. 

 Picric acid, pp., but not at once. 

 Soiiium phospho-molybdate, pp. greenish-yellow, becoming bine with 



ammonia. 

 Todo-potassic iodide, reddish-brown. 

 Mercuric-potassic iodide, white. 

 Colour tests : 



Concentrated sulphnric acid, yeIlow-^~reddish-b^own (potass, bi- 

 chromate intensifies the colours), 

 nitric acid 7 y^^ 



„ hydrochloric acid ) •' 



§ 102. EUPATORIUM cannabinum {Cnmimsitft—TuhuUjIorn). Investi- 

 gators : Shamel (Aiurr. J. Phurm.. 18!)2, 14, 224), ii-olated (a) ; G. Latin 

 (Pharvi. J. /rails, [:i], 11, 192), substance (b). 



(a) EUPATORINE, A. C^dH.i^O.o-HNOs ? (Shamel). Powder consisting 

 of microscopic needles ; alkaline reaction ; bitter ; not fusible withoat 

 decomposition. Sulphate crys. silky needles. 



