Descarboxylysergic acid prepared from 2,3-dihydro-8.beta.-hydroxy-6-methyl-9-ergolene or from penniclavine has oxytocic, serotonin antagonist, prolactin inhibition and muscle contracting activities.

(+)-.beta.-Amino-.beta.-(3,4-dimethoxy-phenyl)-propionic acid and its salts are useful as anti-hypertensive agents.

Acrylic acid or methacrylic acid is purified be crystallization to obtain crystals and a mother liquor, by a process in which the crystals are washed with a was liquid containing the acid and having a temperature from 15 to 40.degree. C. Furthermore, a process for the preparation of acrylic acid or methacrylic acid comprises the abovementioned purification process.

This invention relates to the treatment of depression by administering a composition of essential fatty acids of eicosapentaenoic (EPA) and steraridonic (SA) acids.

New amino acid derivative of acylamino-5-alkylcarbamoyl-2,4,6-triiodobenzoic acids are described together with processes for their preparation and use and novel intermediates useful in preparing these compounds. The compounds are valuable radiopaque agents useful as X-ray contrast media.

Acid-modified terephthalic acid polyesters containing structural elements of 2-sulfonatomethyl-propanediol-(1,3). The polyesters are easily dyeable with basic dyestuffs and can be spun from the melt into filaments.

Tetramic acid analogs of pulvinic acid having anti-arthritic activity are prepared by treatment of the corresponding tetramic acid lactones with an alkali metal lower alkoxide.

A compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are substituents; R.sub.6 is hydrogen, loweralkyl, cycloalkyl, loweralkenyl, arylalkyl, (substituted aryl)alkyl, or (heterocyclic)alkyl; B is a bond, an alkylene group, an alkenylene group, an alkadienylene group or a heteroatom containing linking group; D is a substituted acyl group or tetrazolyl; Z is CO, C(S) or S(O).sub.2 ; Ar is a heterocyclic group; and n is 1 to 3. Also disclosed are a composition and a method for antagonizin...

A process for producing methacrylic acid and/or methacrylic acid ester by oxidative dehydrogenation of isobutyric acid and/or isobutyric acid ester, wherein the improvement comprises using a catalyst having the composition represented by (where X denotes at least one element selected from the group consisting of lithium, beryllium, magnesium, barium, tin, lead, chromium, tungsten, and tellurium; subscripts a, b, c, d, e, f, and g each denote the ratio of the respective elements; b, c, d, e, and ...

The present invention relates to a composition comprising monoaspartic acid esters and polyaspartic acid esters as well as an addition product prepared from an unsaturated dicarboxilic acid compound and a thiol, a process for their production, and their use as reactive component for polyisocyanates in two-component polyurethane systems.