CHEMISTRY OF TIIK LEUCOMAINES. 



think-; it may ! possibly a combination of creatine, 

 ( ,1 1 ,N 3 O,, and a l>a- < .II 10 N 4 O 2 , which, it will be seen, 

 differs from tin- former only by a HCN group. This 

 second ((impound, if it really exists, has an analogy in 

 criiHi-creatininc, the relation of which to creatinine may be 

 exjin s-cd by the equation : 



C 6 H 8 N 4 = C 4 H 7 N 3 0+HCN. 



CRUSO-CBBATININB. CHKATININK. 



In a similar manner, amphi-ereatine may be regarded as 

 C 9 H 19 N 7 O 4 = 2C 4 H 9 N 3 2 +HCN. 



AMPHI-CRKATINB. CRBATINB. 



A BA-K, ( ' M Hj 4 N IO O 5 , was isolated by GAUTIER from 

 the mother-liquors of xantho-ereatinine. It crystallizes in 

 colorless or yellowish, thin, apparently re< tanjinlar plates, 

 which an- tastehss, and possess an amphoteric reaction. 

 The hydrochloridc forms bundles of fine needles; the sul- 

 phate yields a confused mass of nells; the platinochlo- 

 ride is soluble, non-del iqiiescent, and erystalline. When 

 heated with water in a sealed tube at 180-200, it gives 

 otl ammonia and carbonic acid, and is converted into a 

 new base, which, however, lias not l>een studied. This 

 reaction may be expressed by the expiation : 



C n H 24 N 10 9 = 2C 8 H 10 N 4 2 +CO(NH 2 ) 2 . 



UREA. 



The urea which at first forms, is, in turn, decomposed, 



thus : 



CO(NH 2 ) 2 +H 3 = C() 2 +2NH 3 . 



It is to !H' observed that this base ditters iu OOmpOBttioa 

 from the following one by HCN, the hydrocyanic acid 



molecule. 



A l'>\-i:, CjjHjjNnOj, was obtained from the mother- 

 liquors of eruso-ercatinine, and forms rectangular silky 

 |)lati.-. i'( .-einbling those of the preceding base and of 

 .xantho-ereatinine. It forms erystalli/able salts. 



These complex bases will require further study in order 



