DICTIONARY OF THE ACTIVE PUINCIPLES OF PLANTS. 



45 



M.P. 220°; dextro-rotatory ([a]j= +2-1-6°) ; neutral reliction; tasteless, 

 odourless, poisonous (producing convulsions). 



Soluble in 70 parts water, 50 cold alcohol, in chloroform, benzene (and 

 ether '!) ; scarcely in carbon bisulphide. 

 Beactions : 



[Not precipitated by lead acetate, neutral or basic. 

 ,, tannic acid. 

 „ picric acid.] 

 Fehliny's solution, reduced. 

 Photpho-niolybdic :icid. p]i. 

 Colour tests: Concentrated sulphuric acid, blackens. 



(Joucenuated nitric acid gives a crystalline nitro-derivative. 

 On reduction with hydrindic acid, pouring off the liberated iodine and 

 then adding potash, f uchsine red coloration. 



§79. CORNUS Florida (Dogwoud); Cornacec. Investigator: Geiger, 

 Aim. Cheiii. Ph., 14, 20(5, etc. 



{(i) CORNIN B. ; crys silky needles ; neutral ; bitter. 

 Soluble in water, alcohol, tther. 



Precipitants : 



[Xot lead acetate, neutral.] 

 Liead acetate, basic. 

 [Not tannic acid, 

 „ ferric chloride.] 



Silver nitrate, white cryss. pp. 

 [Not mercuiic chloride. 



,, iodine solution. 



,, barium chloride.] 



(b) CORNUS RESWOID (Dogwood Quinine) ; neutral, tasteless, resinous. 

 Soluble in ether and hot alcohol ; not in water. 



§ 80. CORYDALIS group. Corydalis Dicnitra cava Schwg., [C. 

 bulbosa Pers. = C tuberosa -DfC^Bulbocapnus cavus Bernli.], C. fabacea 

 [=C. intermedia], and C. solida [Bulbocipnus digitatus = C. digitata 

 = C. bulbosa Di'c], (a) ; Fumaria officinale (Fumitory), (i), (? «), etc.; 

 FumariaceiK. Aristolocia cava (Birthwori), ('() ; Ar/slolorhiir. [For A. 

 Argentina, see separate entry.] Compare Berberis group, the alkaloids 

 of which are probably chemically connected with these. See (c) below. 



(a) CORYDAUNE A. [.Adeimann's alkaloid No. 1, see (c) ; not Ader- 

 mann's Corydaline, see (/;) and (rf)], CisfljaNOj (Wicke) or Cj.H.jjNO^ 

 = [(^j8H,.(CH30)4N] (Dob'iie) ; ciystallizrs in prisms or needles; M.P. 

 \?<i° (Uobbie) ; alkaline reaction ; bitter in alcoholic solution, or in form 

 of salts. Becomes jellow on exposure. 



Potass, sulphocyanide, white 

 crys. 



Potass, chroraate, yellow. 

 „ bichromate. 



Sodium phiispho-tungstate. 



Potass, iodide, white. 



Iiido-piitassic iodiile, brown. 



Mercuric - potassic iodide, yel- 

 lowish-white. 



Iodine tincture. 



Soluble in ether, chloroform, benzene, amyl alcohol, carbon bisulphide, 

 and turpentine; with difficulty in alcohol ; not in water, which precipi- 

 tates it from alcohol. The best solvent is a mixture of ether and 

 alcohol. 

 Precipitants : 



Alknline hydrates, sol. in excess 



(Wicke) ; insol. (M. Freund). 

 Alkaline carbonates. 

 Ammonia. 

 [Nut lead acetate, neutral or 



basic] 

 Tannic Hcid (to alcoholic solutn). 

 Picric acid, crystalline. 

 Platinum chloride, yellow crvs. 

 Gold chloride, yellow crystalline. 

 Colour tests : 



Concentrated sulphniic acid, colourless ? (Dupuy says yellow to red). 

 Nitric acid produces a brownish-red resinous substance. 

 (/() FUMARINE A. [Adermann's Corydaline (?), Bulbooapnine (?), see (/)], 

 ConHjsNOo ( Reich wald) : six-sided clino-rhombic prisms ; optically in- 

 active, alkaline, bitter. Acetate very soluble. 



Soluble in alcohol (difficultly, Reichwald), in 11 parts chloroform, 

 78 benzene, in amyl alcohol and carbon bisulphide ; but with difficulty in 

 water, and sparingly in ether or petroleum ether. 

 Precipitated by 



Alkaline hydrates. 



[Not by lead acetate neutral.] 



Potassium bichromate, (pp. is F.CrOj] 



[No coloration or pp. with chlorine.] 

 Colour tests : 



Concentrated sulphuric acid, dark violet, changing gradually to 

 brownish-green. 



Concentrated sulphuric acid with potass, bichromate, brown (Reich- 

 wald ob'ained a green with violet streaks). 



Nitre added to sulphuric acid solution, green-v/xvioletAA-yellow. 



Nitric acid, colourless cold, yellowish-brown on evaporation. 



Frohde's i-eagenf, violet-wdark green. 



8eleno-~ulphuric acid, pure violet. 



Vanadyl sulphate, emerald. 



