Acids. 



694 



1330 



BENZENOID ACIDS WITH SEVEN 

 OXYGEN ATOMS. 



BENZENOID ACID CHzu-sOt 



ACID C10H12O7 



Pentaoxyphenylisobutyric acid 



C6H2(U]:l)3.l'fl2.C(UH)(C02H).UH20H 

 a : 2 : 4 : 5 : :i' : o'-Hexaoxy-^B'-puenoxy- 



3-rHENYL(.S(jBrTYRlC ACID 



C6H2(OH)3.CH2.C(OHXCO2H).CH2.0. 



C6H3(PIi)2 



Hexamethyl ether and its methyl ester. 



Lactone of the o-4 : 5'-trimethyl ether. 



Lactone of the a : 4 : 5 : 5'-tetraiuethyl 



ether. 



Engels, Perkin & Robinson. 55947. 



BENZENOID ACID CHzu-hO? 

 ACID ChHmO, 



Phenylpropyl methyl ketone tricarb- 

 oxylic acid. 



Etlnjl ester of the amide-nitrile 



C02Et'.CHAc CHPh.CfKCN l.CO.NHj 



and the ■methyl ester. 



GuarescM. 568'JO. 



BENZENOID ACIDS CnHzn-isOy 

 ACIDS ChHiuO, 



Tetraoxy -benzoylbenzoic acid 



C02H.C6ll,(()HJ2.CO.(36H3(OH)2 



Tetraniethijl ether. [From veratrole and 



lieiiiijjir acid.] 



Bentley & Weizmann. 5f34L 



2' : 4' : 4 : 5-Tetraoxybenzoylbenzoic 

 acid (OH)2C6H3.CO.C6H2(:oHj2.C02H 

 4' : 4 : ^-Tr'imethyl ether. 

 Perkin & Robinson. C0470. 



SULPHONIC ACID WITH EIGHT 

 OXYGEN ATO.MS. 



ACID CHhOcSz 



Dioxybenzene disulphonic acid 



Kauffmann. 58040. Fluorescenz des 

 hydrochiuoii-disidfoMaureii Kaliums. 



BENZENOID ACIDS WITH EIGHT 

 OXYGEN ATOMS. 



BENZENOID ACID CHzn-.sOs 



ACID C,4Hki03 



Pentaoxy---benzoylbenzoic acid 



C(j,H.(,'6H2i'OiJ';,.e'u.( '5142(011)3 



Tetrcuiiethi/I ether. 

 Bentley '*t Weizmann. 54341. 



BENZENOID ACIDS WITH NINE 

 OXYGEN ATOMS. 



ACID C9H,09 



Phloroglucin tricarboxylic acid- 



Geserick. Synthese und Umwand- 

 lungsprodiikte des Phlorogluciutricar- 

 bousaureesters. Diss. Berlin, 1908. 



ACID C.gHisOg 



Brazilinic acid 



C02H,CH2.0.C6H3' OMej.CO.CeH^ 

 (Oile)2.C02ll 

 Perkin & Robinson. 60470. Synthesis 

 of brazilinic acid. . 



ACID C19H20O9 



DUiydrobrazilinic acid. 



Lactone 



(OMe).C.H,<^.H>~f«">!0»'')- 



O.CH2.CO2H 



Perkin e^- Robinson. 60470. Synthesis 

 of the lactone of dihydrobrazilinic acid. 



BENZENOID ACIDS WITH TEN 

 OXYGEN ATOMS. 



ACID CoHs.Oio 



Dihydrohaematoxylinic acid. 



Lactone 



(OMe)2C6H2<^J5>^'^'^'*~^^^^^'' 

 O.CH2.CO2H 



Perkin & Robinson. 60470. Synthesis 

 of the lactone of dihj-droiiaematosylinic 

 acid. 



BENZENOID ACIDS WITH 

 TWELVE OXYGEN ATOMS. 



ACID CHeOiz 



Mellitic acid C'eCCO^Hje 



Silberrad c^ Roy. 61 978. Relationship 



of colour and tluorescence to constitu- 

 tion : Rhodamines of mellitic acid. 



ACID C,6H,tOi2 



a-Phenylpropane a',7,7-trismalonic 

 acid- 



Pentamelhijl e.'<tcr acid and hexamethyi 



e-ater 



CH(C02Me)2.('HPh.CH2.CH 



[CH(CO.,Me)2].CH(C02Me)2 



Meerwein. A., 360, (323). 



