§ 155. PEUOEDANIN, OBEOSELONy ETU. lib 



with metallie salts, nor does it yield angelic acid' or allied Sub- 

 stances when acted upon by alkalies. 



Peucedanm^ is allied to, but not identical with, ostruthiin. It 

 yields no valerianic or angelic acid, biit'. is decomposed by the 

 aiction of acids into oreoselon and metbyl-coiiipounds ; it is, in 

 ■fact, dimethyl-oreoselon, Peucedanin melts at 76°, is coloilrless, 

 crystalline, insolnble in cold water, but freely soluble in alcohol 

 and ether. 



Oreoselmcaia be obtained from peucedanin ; it is almost insoluble 

 in cold water, but soluble in alcoholj ether and benzene. Bisul- 

 phide ot carbon, ammonia and dilute alkalies dissolve it only when 

 warmed, and the latter solution reduces alkaline coppersalts. 

 Tlje alcoholic solution is not. dltered by feriic chloride. A blue 

 fluorescent solution is yielded by-coHc. sulphuric acid, bat not by 

 alkalies. Fused with an alkali, it yields acetic acid and resojrcin 

 (§42). 



Aihamanthm.^^— The statement that this substance is divaleryl- 

 oreoselon requires further invefetigation. It crystallizes in colour- 

 less needles' melting, at 79°, is insoluble in frater, but. dissolves in 

 diluted alcohol and in eihoT. 



LaserpUin^ forms colourless prisms, melting at 114", and is 

 sparingly soluble ia water and alkalies, but freely in alcohol, ether, 

 •dilorbform, benzene,, and bisulphide of carbon. Cone, sulphuric 

 and fuming nitric acid dissolve it with red colouration ^ boUing 

 with aleohcJid po.tash is said to decompose it into angelic acid and 

 laserol. 



(Mebin caxL.alaiyhe obtained in colourless crystals, melting- at 

 120°, (Mfficultly solublo in cold, more easily in warm water, and 

 soluble in 26 parts of ether, 76 of cold, and 10 of boiling alcohol. 

 It can be removed, from aqueous solution by shaking with benzene 

 Or chloroform. Oonc. sulphuric acid is .c9loured red by cubebin. 

 Aqueous alkalies do not dissolve it.* (Cf § 55.) 



Betvlin is likewise tolerably free^y. soluble in ether and boiling 



^ Compare. Hlasiwetz und Weidel, Annal d. Chem. und Pharm. clxxiv. 67 J 

 -Heijt, ibid, clxxvi. 70.{Journ. C^em. Soc. xxviii. 258, 772). 



^ Compare Scbhedermann und Winkler, AnuaJ. d. Chem. und Pharm. li. 

 515, 1844 ; Hlasiwetz und "Weidel, ibid, clxxiv. 67. 



* Compare Feldmann, 'Ueber das Laserpitin.' t>isB. Gottingen. 



* For an analysis of cubebin compare Schmidt, Jahresb. f. Pharm. 51, 1870 

 (Pharm. Joum. and Trans. [8]', ii. ^'6). For cubebin see Weidel, Jahresb.. f. 

 I'hsrm. 68, 1877 (Amer. Journ. Pfawm. 1. 257). 



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