1930 



782 



1930 



CYCLOID C4H7O4N3 



Dioxjrtriazolidine-acetic acid 

 N(0H).CH.C02H 



'X -CMe 

 Euler, H. mid Euler, A. Berlin, Ber. 

 D. chem. Ges., 36, 1903, (4253-4256). 



HO.N<; 



CYCLOID C6H7O4N3 



Dimethylvioluric acid 



H0,N:C<«-J;-^>C0 



Whiteley, M. A. Xote on the action 

 of barium hrdroxide on. London, J. 

 Chem. See, 83, 1903, (18-23); [Ab- 

 straetj Proc. Chem. Soc., 18, 1902 (220). 



CYCLOID C6H9O2N3 



Histidine NH^ . CsH^Nj . CO^H 



(Ainhiohistine carboxylic acid). 



Frankel, S. Wien, MonHfte Chem., 

 24, 1903, (229-243). 



Herzog', R. 0. Notiz iiber Histidin. 

 Ho])pe-Seylers Zs. phvsiol. Chem., 

 Strassburg, 37, 1903, (248-249). 



Steudel, H. Das Verhalten der 

 Hexonbasen znr PLkrolonsaare. Hoppe- 

 Seylers Zs. physiol. Chem. Strassburg, 

 37, 1903, (219-220). 



CYCLOID C7H5O2N3 



Benztriazole carboxylic acid 



CH:CH.C:-\ 

 COjH.C = CH.N.CH^ 

 Maxckwald, W. und Rudzik, K. Ber- 

 lin, Ber. D. chem. Ges., 36, 1903, 

 (1111-1120;. 



CYCLOIDS CSH7O2N3 



3, 5-Dioxy-l-phenyl-triazole 



Diethyl derivative 

 ^C(OEi) : N 

 ~C(OEt) . NPh 

 Acree, S. F. Berlin, Ber. D. chem. 

 Ges., 36, 1903, (3139-3154). 



N<, 



CYCLOID C3H9ON3 



Hydrazino-dimethyl-pyridine 

 carboxylic acid anhydride 



[2:6: ^]c5HMe,X<^"g>NH 



Michaelis, A. und Arend, K. v. Ber- 

 lin. Ber. D. chem. Ges., 36, 1903, (515- 



522). 



CYCLOIDS C9H9O2N3 



l-Phenyl-4-metliyl-urazole 



C(OH) : N 

 '>'»"><C0_NP1. 

 and the acetyl derivative 

 ^CO.NAc 

 -CO . NPh 

 Acree, S. F. Berlin, Ber. D. chem. 

 Ges., 36, 1903, (3139-3154). 



NMe<^ 



3-Oxy-l-plienyl-4-methyl-triazolone 



Ethyl derivative 



^^^< CO . NPh 



and the corresponding methyl deriva- 



tive. 

 F. Berlin, Ber. D. 



Acree, S 

 Ges., 36, 1903,(3139-3154) 



chem. 



Phenyldiketohexahydrotriazine 



XH . CO. 



^^p^<chV.co>ns 



Busch, M. Berlin, Ber. D. 

 Ges., 36, 1903, (3877-3890). 



chem. 



CYCLOID CgHuONs 



Hy drazino -trimethylpyridine 

 carboxylic anhydride 



C,HMe3X<(5^Q>XH 



I 



Micliaelis, A. und Arend, K. 



Berlin, Ber. D. chem. Ges., 36, 

 (515-522). 



von. 

 1903, 



1-Phenylurazole 



^^^<C0 NPh 



{3-Oxy-l-phenyl-triazolone) and the 

 methoxy and ethoxy derivatives. 

 Acree, S. F. Berlin, Ber. D. chem. 

 Ges., 36, 1903, (3139-3154). 



CYCLOID CiiH,iON3 



-Oxy-l-phenyl-3-propenyl-triazole 



,C(CH- : CHMe) : X 



^^C(OH) 



Rupe, H. und Metz, G. 

 D. chem. Ges., 36, 1903, 



-XPh 



Berlin, Ber. 

 092-1104). 



