292 W. Gibbs on Uric Acid. 
N=¢€-—Ho N=—€—Ho N=€—Ho 
N-6-Ho N—C—Ho -N-€_Ue, 
! 
Ne.t-—Ho .NaG-NUy= Nae Na, 
Cyanuric acid. Melanuric acid. Ammelin, 
N=€-Ho N=€-—(€H,)o =€-— Ho 
ae eee ae 
N—€—Ho N-€-(€H,)o N—€- Ho 
ee ba 
8-€=0 0-€=9 9 —€=—(Ho), oh 
Parabanic acid. Cholestrophane. Oxaluric acid.  Oxalurami 
ee: 
N—€—Ho N=—€—Ho @-—€=NH Nee —Ho 
7 tiie a Gants Nico Hs eS 
t | 
6=0-—H,  6—€=H, N=€—Ho _0-0=H, 
Glycoluric acid. Lantanuric acid. Fulminuric acid, Hydantom. 
Of these bodies melanuric acid, ammelin and melamin were 
first derived from cyanuric acid by Kekulé.* 
@=€—Ho O=€—Ho © =€-—Ho NO—€=Ho 
i 
o—€ H—€—Ho Hy= cH 
! | \ 
@=€—Ho O=€—Ho © —€—Ho e=€- ee 
Mesoxalic acid, Tartronic acid. Malonic acid. Nitrosomalonie 
NH,—€—Ho © =€—Ho H,=€—Ho H,=¢-® 
I —_— 
H  Hié—-Ho “H—¢-Ho Boe 
] 
—U—HO H,=€— te) H,—€—Ho 
Amidomalonic acid. OEE acid. Glycerin. | Hydrocat ; 
Tetracyanic acid, ©€,N,H,©,, has not yet been ola the 
consider its existence as at least probable, and take 1 
first term of the following series : 
" , i 
_ —« N=€—Ho N=€—Ho N=€—Ho N=€—Ho n-se—H 
_ N-€-Ho N-6—Ho N—é—Ho N—€—Ho N 
™ N—€—Ho N-¢-H N—¢—Ho N—€-H N 
: W645 $6. N—¢—H N-€ -H N- 
Tetracyanic acid. Mycomelic acid. H H 
N=€~Ho mee Ho uke tip W—¢—Ho # 
I I 
~e Ho S62 Ho o—e—H oS 
O=€_H o=¢-H o—t-H Oo lam 7 
xan, Dialurie acid, Alloxanie acid. Barbituric acid. Brome : 
* Lehrbuch, i, p. 353. 
