436 H. B. Hilli—Ethers of Uric Acid. 
Methylparaban, C,H(CH,)N,03. 
Although methylalloxan is so unstable in the presence of 
bases, in acid solution it possesses remarkable stability. It 
may be boiled for some time with strong nitric acid, or with 
tion with ammonia disappears. On prolonged boiling (about 
an hour) with strong nitric acid, the oxidation is complete, ‘and 
the solution contains methylparaban. For its preparation I 
have found it most advantageous to boil methyluric acid with 
five or six parts of nitric acid of sp. gr. 13, until a drop taken 
out gives no coloration with ammonia. The excess of aci 
then driven off on the water bath, the syrupy residue diluted 
with a little water, and well shaken out with ether. On distill- 
02260 grm. lost 0°0030 
1, 0°1714 grm. gave 0 asi grm. CO,. 
2. 0°2160 grm. gave 0°0785 grm. H, 6, ie 0°2629 grm. CO,. 
Calculated for Found. 
C,N.H,0, 1 
Oo 87°50 $712 37°48 
3°13 4°04 
The substance gives no precipitate with calcic chloride, even 
after the addition of amm onic hydrate. On warming the 
Calculated for Foun 
AgC,N,H,0, 
Ag 45°95 59 
re can ae no doubt that this substance is cea with 
that i as by Dessaignes+ from creatinine, which was ‘rst 
essaign: 
recognized by Streckert as methylparaban. Dessaignes gives 
* The hydrogen in this anal lost. 
+ Ann. pening ey poling t Ibid, exviii, 164. 
