1330 



5Cu 



1330 



BENZENOID ACIDS WITH SEVEX 

 OXYGEN ATOMS. 



ACIDS CaH2n_io07 



ACID CsHbO; 



Trioxycarboxyphenylacetic acid 



CO2H . C6H2(OH)2 . CH(OH) . CO2H 



Dimethyl derivative 



C11H12O7 i.e. 



COjH . CeH2(OMe)2 . CH(OH) . CO2H 



Lactone CnHioOe i.e. 



Ferldn, W. H. jun. [Lactone of 

 dimethoxycarboxyniandelic acid and tlie 

 action of heat on it]. London, J. Chem. 

 Soc, 81, 1902, (1026-1027). 



ACIDS CnH2n-i207 



ACIDS CgHeO? 



Dioxycarboxyphenylglyoxylic acid 

 CO2H . C6H2COH)2 . CO . CO2H 



Dimethyl derivative 



C11H10O7 i.e. 



COjH . CO . C6H2(OMe)2 . CO2H 



Perkm, W. H. jun. [Dimethoxy- 

 carboxybenzoylformic acid, from the 

 oxidation of trimethylbrazilin, and its 

 salts ; also the action of heat and of 

 hydroxylamine and semicarbazide on it, 

 and its reduction.] London, J. Chem. 

 Soc, 81, 1902, (1008-1026). 



ACID CioHsO? 



Cochenillic acid. 



/\j,HYDRIDE CioHgOg 



and its Benzoyl derivative 

 C6HMe(0 . C7H50)(C02H)(gg>0 ) 



Liebermaim, C[arl] mid Lindenbaum, 



S. Ueber die Acetylirung der Coche- 

 nillesaure. Berlin, Ber. I), chem. (jes., 

 35, 1902, (2910-2919). 



ACETYLCOOHENILLIC ACID C12H10O8 

 and its anhydride Ci2Hg07 



liebermajm, C[arl] and Lindenbamn.S. 

 Berlin, Ber. D. chem. Ges., 35, 1902, 

 (2910-2919). 



Trioxybenzoyl-pyi'uvic acid 



C6H2(OH)3 . CO . CH2 . CO . CO2H 



Ethyl ester of the dimethyl ether 



[4:6:2:1] 



C6H2(OMe)2(OH) . CO . CH2 . CO . COaEt 



KostaaecM, St[anislaus] von und 

 Ruijter de Wildt, J. C. de. BerUn, Ber. 

 D. chem. Ges., 35, 1902, (861-865). 



SULPHONIC ACIDS WITH EIGHT 

 OXYGEN ATOMS. 



SDLPHONIC ACIDS. 

 CnH^u-sOsSa 



SULPHONIC ACID C7H6O8S2 



Disulphobenzoic acid 



C6H3(S03H)2C02H 



Preparation. 



Hobenemser, W. Notiz zur Darstel- 

 lung von Anthrachrvson. Berlin, Ber. 

 D. chem. Ges., 35, 1902, (2305-2306). 



BENZENOID ACIDS WITH EIGHT 

 OXYGEN ATOMS. 



ACIDS CnH.n-ieOs 



ACID CnHioOa 



Phenylcarboxyaconitic acid 



CeHj . C(C02Hj2 . C(C02H) : CH . CO2H 



Rubemann, Siegfried. [Fonnation of 

 ethyl phenylcarboxyacouitate from ethyl 

 phenyknalonate and ethyl chloi'ofuma- 

 rate, and its hvdi-olysis.] London, J. 

 Chem. Soc, 81, 1902, (1214-1217); 

 [abstract] London, Proc Chem. Soc, 

 18, 1902, (181-182). 



ACID CuHizOs 



Benzylcarboxyaconitic acid 



CHjPh . C(C02H)2 . C(C02ll) : CH . COjH 



Rubemann, Siegfried. [Fonnation of 

 ethyl benzylcarboxyaconitate fi-om 

 ethyl benzylmalonate and ethyl chloro- 

 fumarate.] London, J. Chem. Soc, 81, 

 1902, (1214). 



