Cycloids containing oxygen. 812 



1911 



CYCLOID CnH,204 



Diacetyldimethylpyrone 



Palazzo e Onorato. Dinietildiacetil- 

 pirone e costituzione dei eoinposti 7- 

 pironici sintetici. Li., 35, (476). 



CYCLOID C,3H,404 



Diketotetramethyltetrahydro- 



coumarin 



CMe2.C().C.C'H:CII 



CO.CMe.C.O — CO 



Herzig n. Wenzel, F. II., 26, (1359). 



CYCLOID C,6H,2 04 



Xanthylacetoacetic acid 



Ethyl ester. 

 Fosse. Bl., 35, (1005). 



CYCLOID C„Hi604 



P-Veratroylcoumarane. 

 Kostanecki, Lampe u. Marsclialk, Cli. 

 B., 40, (3660). 



CYCLOID C18H16O4 



3-Oxy-l'-isopropylflavonole. 

 Kostanecki, St. von. B., 40, (3669). 



CYCLOID Ci^H,604 



2-Veratroylchromane 



(MeO),.C,H3.CO.C6H3<^^^ ^1'^ 



Kostanecki, Lampe n. Marschalk, Ch. 

 B., 40, (3660). 



CYCLOID C18H2CO4 



Leuco-2-veratroylchromane 



(MeO),.CeH3.CH(OH).CsH3<^jjJg^ 



Kostanecki, Lampe u. MarscMalk. 

 loc. cit. 



CYCLOID C19H1SO4 



Xanthylethylacetoacetic acid 



0<o'S'>CH.CEtAc.CO,H 

 Fosse. Bl., 35, (1005). 



CYCLOID C,,H,404 



Xanthylbenzoylacetic acid 



0<n'l]'>CBz.C02ll 



Elliyl ester. 

 Fosse. BL, 35, (1005). 



CYCLOIDS C2:Hit04 



4'(5')0xy-3 : 6-dimethyIfluorane 



HO.CeHs CeHaMe 



4'(5')-0xy-2 : 7-dimethylfluorane. 



Bentley, Gardner, jun. & Weizmann, 

 C. J.C.,91, (1626). 



CYCLOID C24H,404 



o-Naphtholresorcinolphthalein 

 anhydride 



CsH, Cen3(on) 



C0.0>'^<— C.„H>° 

 and its methyl ether and acetyl 



DERIVATIVE. 



Friedl, Weizmann & Wyler, M. J.C., 



91,(1584). 



CYCLOID C24H16O4 



Dinaphthapyrylacetoacetic acid 



0<p"5'>CAc.C02H 



Ethyl ester. 

 Fosse. Bl.. 35, (1005). 



CYCLOIDS WITH FIVE OXYGEN 

 ATOMS. 



CYCLOID C6H4O5 



3-0xy-4-pyrone <i-carboxylic acid 



{Comcnic acid) 



"^^CH : C(OH)— ^""^ 

 Meyer, H. M., 26, (1311). 



CYCLOID CHtOs 



Pyrane dicarboxylic acid 



. C(C02lI) : CH pj. 

 ^^C(C02H) : CH^^^2 



Esters, acid chloride, amide and anilide^ 

 Also the DiiiROMiDE C7H6Br205 



Blaise et Gault. BL, 1, (129). 



