1930 

 aiu .-ang-Naphthafluoflavine 



N : C . NH 

 ^"^^<X : C . NH>^'°^^ 

 Hinsberg, 0. imd Schwantes, E. 

 Berlin, Ber. D. ehem. Ge?., 36, 1903, 

 (4039-4050). 



aHr/.-aw^.-Dinaphthafluoflavine. 



Hinsberg, 0. mid Schwantes, E. Ber- 

 lin, Ber. I). cheui. Ges., 36, 1903,(4039- 

 4050). 



Dihydroquinoxalophenanthrazine 



Hinsberg, 0. und Schwantes, E. Ber- 

 lin, Ber. D. cheni. Ges., 36, 1903, (4039- 

 4050). 



CYCLOID C2 H.cN* 



Tetraphenyltetrazoline 



DI-p-NlTI:0 DERIVATIVE 



C6H5.C:X.N.CgH,.X02 

 NOj.CoH^.N.XiC.OeHs 



Bamberger, E. mid Pemsel, W. Ber- 

 lin, Ber. 1). chem. Ges., 36, 1903, (347- 

 358K 



CYCLOID C23H22N4 



N(N : CHPh) . CH2 



from ethylenebromide and hydrazine 

 hydrate. 

 Stolle, R. -J. prakt. Chain., Leipzig, 

 (N.F.), 67, 1903, (143-144). 



CYCLOIDS CONTAINING FOUR 

 NITROGEN ATOMS AND OXYGEN. 



CYCLCID C4H4ON4 



Pyrroyl-azoiinide 



CH.CH ^^,. .. ^N 

 CH . NH 



186 1930 



CYCLOID C.H,02N4 



Benztetrazole carboxylic acid 



GH : CH . C : N 

 COjH.C^ CH.N.N ^^ 

 Markwald, VV. iind Rudzik, K. Ber- 

 lin, Ber. D. chem. Ges., 36, 1903,(1111- 

 1120). 



CYCLOID CHO^Ni 



Dioxypyrazinophenazine 



CeH,<-^^^9-^'^9^^a 

 N:C.N:C.UH 

 Hinsberg, 0. und Schwantes, E. Ber- 

 lin, Ber. D. ciiem. lies., 36, 1903 (4039- 



4050). 



CYCLOID C,,H ON4 



Oxy-methyl-pyrazinophenazine 

 C,H,<''^ ^ ^ -^" V^'*^ 



X : C . N . C . OH 

 Hinsberg, 0. und Schwantes, E. Ber- 

 lin, Ber. D. chem. Ges.. 36, 1903, (4039- 

 4050). 



CYCLOID Ci,H,202N4 



Homofluorindine carboxylic acid. 



Ullmann, ¥. und Mauthner, F. Ber- 

 lin, Ber. i). chem.lJes., 36, 1903,(^4026- 

 4034). 



CYCLOID CuHi.OzN* 

 Bechhold, H. Berlin. Ber. D. chem, 

 Ges., 36, 1903, (4131-4135). 



>co.N<r. 



I 



CYCLOID Cj H2r,02N4 



Dip oxy-tetraphenyltetraz :.liiie 



DIMETHYI, ETHER 



-MeO . CgH^ . C : N . N . CgHs 



CgHs . N . N : C . CeH^OMe 

 Bamberger, E. und Pemsel, W. Ber 

 lin, Ber. D. chem. Ges.. 36, 1903, (359 



374). 



Piccinini, A. e Salmoni, I^. Gazz. 

 chim. ital., Palenno, 32, parte i, 1902, 

 {246-2o.3j. 



CYCLOIDS CONTAINING FOU. 

 NITROGEN ATOMS AN. 



SULPHUR. 



CYCLOID Ci.HijN.S 



Diphenyl-s-X-dihydi'otetrazinethiol 



CPh<^^^'^.j^'>C.SH 



Busch, M. J. prakt. Ciiem., Leipzig. 

 (N.F.), 67, 1903, (201-264). 



I 



