44 



dictkjnauv i)f the active ritiNCii'Lrs oi-- plants. 



(/) CICUTOXIN B. Amorphous, resinous, poisonous ; acid reaction, 

 disagreeable taste. Biihai, Arrhiv. exp. Pathol., 5, 281. 



Soluble in alcohol, ether, chloroform, and hot water ; nut in petroleum 



ether. 



Alkaline hydrates ) ,• , 

 , ■ ■' > dissolve. 



Ammonia ) 



§ 7(5. CONVALLARIA majalis (Lilv of the Valley); Liuacr<r. In- 

 vestigator : Walz, Jahrli. Phanit.. vols. 7 and 8 ; also N. Jalirb. Ph., vols. 

 5 and 10. 



(a) CONVALLAMARIN G., CjsHj^Oo^. Crystalline, neutral, bitter-sweet 

 taste ; phy.-iogical action like JJiyitahn. Yields sii^ar and Coiwallaiiiiireliii. 



Soluble in water, ale ihol, chloroform, aniyl alonhol (removed by last 

 two solvents from acid aqueous solution. Insoluble in ether. 



Reactions : 



Pp., Tannic acid. 

 Merciirous nitrate, white pp. 

 [No pp., most other reagents.] 



Ainnioaia dis-olves. 



[No p|i. lead acet.ue neutral or 



bas.c] 



Colour tests : 



Sulphuric acid added to aqueous solution, violet. 



„ „ with bromine, brown, but violet in presence of water. 



Hydrochloric acid warm, red. 

 (h) CONVALLARIN G., C,„H;„0„ (Walz) ; crystallizes in rectangular 

 pillar* ; neutral reaction ; sharp taste. 



Soluble in alcohol, scarcely in water (which it renders frothy), and not 

 in etber. 



Xot precipitated by lead acetate, neutral or basic. 



§ 77. CONVOLVULACE.a; various: Convolvulus purga (Ipomoea 

 Scbiedeana, Jalap), (ii) and {/>) ; C. orizibensis and C. scamraonia, (f), 

 ((/) ; Ipomooa turpethi, (c), ( /) ; I. simulans (Tampico jalap), (;/). 



(«) CONVOLVULIN G. (Buchner's Jalapin, Kayser's Rhodeoretin), 

 C31H 5,0,6 (Mayer) ; amorphous ; M.P. 150° ; feebly acid reaction ; taste- 

 less. Hydrochloric acid converts first into sugar and Convolvulinol (/;), 

 then into Convolvulinic acid. It is not traceable in excretions, but may 

 be found in stomach after death. 



Soluble in acetic acid in all proportions, also in alcohol and acetic ether, 

 but scircely in water, amyl alcohol, or chloroform, and not in ether, 

 benzene, or petroleum ether. 



Reactions : 



Alkaline hydrates j 



,, carbonates dissolve, with conversion to Convolvulinic acid. 

 Ammonia * 



No pp. with metallic salts that are soluble in alcohol, except silver 



nitrate. 

 Concentrated sulphuric acid, gradually pure red. 

 (//) CONVOLVULINOL [from (-;)]; cr.vs. flexible needles ; M.P. :J9°. 

 Soluble in alcohol and ether, but witli dilhculty in water. 

 ((■) JALAPIN G. (""cimmonin, Kayser's Para-rhodeoretin), C'^jHjjOj, 

 (Ma\er ; Spirgati-) ; amorphous, colourless, resinous ; M P. 160° ; feebly 

 acid reaction ; tasteles.*. 



Soluble in alcohi.l, ether, chloroform, a'nyl alcohol, and acetic acid ; 

 witli iliHicultv in wat>r, benzene, and carbon bisulphide. 



Reactions : 



AlKaliue hydrates) ,• , 

 , ■' dissolve. 



Ammonia 1 



Concentrated sulphuric ;icid, gradual pare red. 



('/) JALAPINOL (from preceding substance), possibly identical with (6) ; 

 cry.-tiillirie : M.P. Cd-b'. 



Soluble in alcohol and tther, not in water. 



Alk dies convert to Jalapinic acid (Convolvulinic aci I V). 



(f) roflPf r////V G., CsjHssOis (Spirgatis) ; amorphous; brownish-fellow, 

 resinous: M.P. 183°; taste gradually sharp and bitter. Acids produce 

 sugar and (/ ). 



Soluble in alcohol ; not in water or ether. 



Concentrated sulphuric acid, purple. 



(/) TURPETHOL (from above); crys. microscopic needles; M.P. 88°; 

 burning taste ; acid reaction. 



Soluble in alcohol. 



(r/) TAMPICIN G., CjjH.jOn; amorphous, resinous; M.P. l.SO°. Decom- 

 posed by loniJ heatin.; at iOU°. Acids convert to Tampicolic acid, or on 

 further treatment Tampicic acid. 



Soluble in alcohol and ether. 



Concentrated sulphuric acid, purple. 



§ 78. CORIARIA myrtifolia : Pl.,/tn!,ireir. The leaves and fruit, 6 to 

 9 parts in ItiU.iltiu. Eiban, fumpt. liendux, vols. 67 and ii3. 



CORIAMYRTIN G., Cj^II^uOio ; crystallizes in clino-rhombic prisms ; 



