1910 



881 



Cycloids containing oxygen. 



2, 4'-Dioxyflavonol 



DhneUioxy ami diaccioxy JlnvoDoI. 



Kostanecki, St. von iind Stoppani, 

 if. L. Berlin, Ber. D. cliem. Ges., 37, 

 1904, (781-784). 



3, 2'-Dioxyflavonol 



and DIMETHOXYI-LAVONOL aud its nitroso 

 derivative. 



Kostanecki, St. von iind Szlagier, A. 

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

 1901, (4155-4158). 



3, 3'-Dioxyflavonol 



and DiMETiioxvFLAVONOL and its 

 o-?so7zifroso-derivative. 



Kostanecki, St. von und Widmer, A. 

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

 (4159-41G1). 



3, 4-Dioxyflavonol 



also 3, 4-DiMETHOXYFLAvoNOL and its 

 acetyl derivative. 



Dobrzynski, F. nud Kostanecki, St. 



von. Berlin, Ber. D. chem. (les., 37, 

 1904, (2806-2809). 



3, 4'-Dioxyflavonol 



and DiMETHOXYFLAvoNdL and its 

 a-i8on'itroso derivative. 



Juppen, K. und Kostanecki, St. von. 

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

 (4161-4163). 



CYCLOIDS Ci.HisOs 



2, 3', 4'-Trioxyflavanone 



Trimcthijl derivative. 



Kostanecki, St. von und Kugler, S. 

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



(779-781). 



3, 3', 4'-Trioxyflavanone 



also S-Ethoxy-S', 4'-di.\ietiioxyflavanone. 



Kostanecki, St. von, Lampe, V. und 

 Tambor, J. Berlin, Ber. 1). chem. Ges., 

 37, lUOl, (784-791). 



Butin 



CeH3(OH)<0-CH.CeH3(OH)3 



Perkin, A. G. und Hummel, J. J. 



[Butin, aud its triacetyl and trilienzoyl 

 derivatives and trimethyl ether; also its 

 conversion into the colouring matter, 

 butein.] Loudon, J. Chem. Soc, 85, 

 1904, (1459-1472). 



CYCLOID CicHinOs 



Naphthacoumarin-acetic acid 



Ethyl ester. 



Knoevenagel, E. und Langensiepen, 



E. Berlin, Ber. D. cliera. Ges., 37, 1904, 

 (4492-4496). 



CYCLOID CyHisOs 



a-Oxy-^-phenyl-7 piperonylbutyro- 

 lactone 



CH(C7H5U2J.O^(^Q 



CH(C6H5). CO 

 2 isomeridesand tbeir benzoyl and acetyl 

 derivatives. 



Erlenmeyer, E. ju?z. und Braun, A. 



Liel)ius Ann. Chem., Leipzig, 333, 1904, 



(254-268). 



CYCLOID CijHieOs 



l.3.8.-Trioxy-2.4.5.7-tetramethyl- 

 fluorone 



,CH 



CeMe2(OH)3<^^>C6Me20(OH) 



Wenzel, F. und Schreier, A. Wien, 

 MoiiHfte]Chem., 25, 1904, (657-681). 



CYCLOIDS CnHisOs 



Tetraoxytetramethylxanthene 



Tctraaccfijl derivative. 



Wenzel, F. und Sclireier, A. Wien, 

 MonHfte Chem., 25, 1904, (657-681). 



Tetraketotetramethyloctohydro- 

 xanthydrol 



diethyl ether of the tctrabromo derivative 

 CMeBr.CO.CBr.CH(()Me).C.CO.CMeBr 

 CO.CMe : C — 0- C.CMeBr.CO 



Wenzel, F. und Sclireier, A. Wien, 

 MonHfte Chem., 25, 1904, (657-681). 



CYCLOID CioHioOs 



Dicoumarin ketone 



and its oxime. 



Knoevenagel, E. und Langensiepen, E. 

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

 (4492-44896). 



