Egyt Gyogyszervegyeszeti Gyar

Patentbureau Danubia

Janos Gundel

Pal Benko

Karoly Magyar

Daniel Bozsing

Laszlo Pallos

Ildiko Ratz Nee Simonek

Jeno Kovacs

Albert Balogh

Erzsebet Matrai

2-Hydroxymethyl-quinoxaline-1,4-dioxide derivatives, a process for

The invention relates to fodder concentrates, fodder additives and fodders having antimicrobial and/or weight-gain increasing effects which comprise as active ingredient a new compound of the general formula (I) ##STR1## wherein R represents a C.sub.1-20 alkyl, a C.sub.1-6 alkoxy group, an optionally substituted C.sub.6-10 aryl group, a phenyl-(C.sub.1-3 alkyl), a C.sub.3-7 cycloalkyl or a 5 or 6 membered heterocyclic group containing one or two nitrogen and/or oxygen and/or sulfur atom(s),

Pyridazino[4,5-b]quinoxaline-5,10-dioxide derivatives, a process for

The invention relates to fodder additives, fodder concentrates and fodders with weight gain increasing and fodder utilization improving effects, which contain as active agent a new compound of the general formula (I), ##STR1## The invention also relates to a process for the preparation of compounds having the general formula (I) by reacting a compound of the general formula (II), ##STR2## wherein Z is oxygen atom or represents two lower alkoxy groups and R.sup.1 is as defined above, with a compound of the general formula (III), ##STR3## wherein Q, A, B and n are as defined above, and, if desired, converting the resulting compound of the general formula (I) into another compound of the general formula (I) by well-known reactions. The compounds of the general formula (I) are new.

Methyl-quinoxaline-1,4-dioxide derivatives

The invention relates to novel quinoxaline-2-yl ethenyl ketones, their preparation and compositions containing them. The novel quinoxaline-2-yl ethenyl ketones of the general formula I ##STR1## wherein R.sub.1 represents an aryl group or a heterocyclic group comprising one or more nitrogen and/or oxygen and/or sulfur atoms wherein both the aryl and heterocyclic groups are optionally substituted by one or more identical or different substituents,

Quinoxaline-2-yl ethenyl ketones

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Budapest, Hungary

Janos Gundel