Phenoxycarboxylic acids of the formula ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, Z and n are as hereinafter set forth, are as described. The compounds of formula I are antagonists of slow reacting substance of anaphylaxis (SRS-A), which renders them useful as agents for the treatment of allergic conditions.

Secalonic acids having a 2,4'-linkage of the formula (I) or a 4,4'-linkage of the formula (II). ##STR1## .

Novel tetracarboxylic acids are described of the formula ##STR1## wherein Ar, R.sub.1 and R.sub.2 are named substituents, and both n's are zeros or ones.

The present invention relates to chlorocitric acids of the formula ##STR1## and stereoisomers, optical antipodes and pharmaceutically acceptable salts thereof, to methods of preparation thereof, including intermediates involved therein, and to their use as anorectic agents for the treatment of obesity in mammals.

Certain mono- and disubstituted-5-sulfamylbenzoic acids, many of which are novel, and their use in lowering blood lipid levels in mammals.

Novel compounds having the formula (II) ##STR1## where X is radioactive Se or Te, z is 0 or 1 and R is OH or an amino acid residue, particularly 23-[.sup.75 Se]-selena-25-homocholic acid and its glycine and taurine conjugate have outstandingly good properties for the investigation of bowel function.

The present invention relates to chlorocitric acids of the formula ##STR1## and stereoisomers, optical antipodes and pharmaceutically acceptable salts thereof, to methods of preparation thereof, including intermediates involved therein, and to their use as anorectic agents for the treatment of obesity in mammals.

The present invention relates to chlorocitric acids of the formula ##STR1## and stereoisomers, optical antipodes and pharmaceutically acceptable salts thereof, to methods of preparation thereof, including intermediates involved therein, and to their use as anorectic agents for the treatment of obesity in mammals.

A method for the separation of nitric acid from a mixture of nitric acid with one or more of phosphoric, sulphuric or hydrochloric acids, in which the nitric acid is selectively extracted from a first phase comprising the acid mixture into a second phase by an amine nitrate. The method may conveniently be carried into effect by treating an aqueous mixture of acids with kerosene containing tri-n-octylamine nitrate and a modifyier e.g. decanol following which the excess nitric acid is stripped fro...

The present invention relates to chlorocitric acids of the formula ##STR1## and stereoisomers, optical antipodes and pharmaceutically acceptable salts thereof, to methods of preparation thereof, including intermediates involved therein, and to their use as anorectic agents for the treatment of obesity in mammals.