1930 



CYCIMID CONTAINING THREE 

 NITROGEN ATOMS, SULPHUR 

 AND OXYGEN. 



CYCLOID C^HtONsS 



1-Phenyl- 3 - thiour az ole 



xu.xph 



TS.NH 



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

 Ges., 37, 1904, (6]8-(j25). 



NH<^ 



CYCLOID C.HgONsS 



1 -Phenyl- 4-methyl-3-thiour az ole 



NMe<^W = N 



CO — NPh 



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

 Ges., 37, 1904, (618-625). 



CYCLOID CuiHhONsS 



Benzyl-4 methylthiourazole 



^^"■^^ >NMe 

 NC,H,.CS 



Busch, JI. und Opfermann, E. Berlin, 

 Ber. D. cliem. Ges., 37, 1904, (2333- 

 2338). 



CYCLOID CsHnONsS 



Benzylphenylthiourazole. 

 Busch, M. und Opfermann, E. Berlin, 

 Ber. D. cliem. Ges., 37, 1904, (2333- 

 2338). 



CYCLOIDS CONTAINING FOUR 

 NITROGEN ATOMS. 



CYCLOID C5H4N4 

 Purine DrAMmoruuiNE 

 ,N : C(Nn2).C.NH.. 



C(NtI,)^ 



-C.N 



/ 



CII 



(Amhioadcninc). 



Traube, W. Berlin, Ber. D. clieni. 

 Ges., 37, 1904, (4544-4547). 



CYCLOIDS CbHuN, 



C-Dipropyl-s-dihydroLetrazine 

 C3H,.c<;;^J^|>c.C3H, 



Stolle, R. und Zinsser, G. J. prakt. 

 Cheni., Leipzig, (N.E.), 69, 1904, (480- 

 496). 



930 Cycloids containing nitrogen. 

 C-Di-isopropyl-s-dihydrotetrazine. 



stolle, R. uiiil Gutmann, L. J. j)rakt. 

 Chem., Leip/.Ii.-, (N.F), 69. 1904, (497- 

 502). 



CYCLOID CiiHsN4 



2-Phenylpurine 



O-CiiLORo derivative, also 



2-r'llEXYLADi:XIN'E. 



Trau\je, W. und Herrmann, L. Berlin, 

 Ber. I), chem., Ges., 37, 1904, (2267- 

 2272). 



CYCLOID C22H,4N4 



Naphthabenzofluorindine. 



Nietzki, R. und Vollenbruck, A, 

 Berlin, Ber. D. cliem. Ges., 37, 1904, 

 (3887-3891). 



CYCLOID C^HioN, 



N aplithafluorindine . 

 Nietzki, R. und VoUenbruck, A. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (3887-3891). 



CYCLOIDS CONTAINING FOUR 

 NITROGEN ATOMS AND OXYGEN. 



CYCLOID C6H4ON4 



Hypoxanthine 



T-DlAZOBENZEXESULPHONATE CiiH804N£,S 



Burian li. Berlin, Ber. D. cliem. 

 Ges., 37, 1904, (696-707). 



CYCLOID C6H4O2N4 



Xanthine 



7-DlAZOBENZENESULPnaNATE, CnHsOsNgS 



Burian, R. Berlin, Ber. D. chem. 

 Ges., 37, 1904, (696-707). 



CYCLOID CsHfONs 



Guanine 



7-DlAZOnENZENESULriIONATE, Ciill304N,S 



Burian, 1'. Berlin, Ber. D. chem. 

 Ges, 37, 1904, (696-707). 



CYCLOID C6H6O4N4 



Isoallituric acid 



CsHoO^N^.CsHjO^N^^ 

 and the ^-nitro derivative. 



Siemonsen, L. Liebigs Aun Chem., 

 Leipzig, 333, 1904, (101-141). 



