Abstract: Disclosed is a novel diagnostic reagent system for the detection of hydroperoxides or substances which react with peroxidatively active substances resulting in the liberation of hydroperoxides which reagent system comprises a chromogenic oxidation indicator and a peroxidase or a peroxidatively active substance, together with an inhibitor of color generation selected from the group of 1,4-disubstituted semicarbazides, thiosemicarbazides and 1,5-disubstituted carbazides as inhibitors of color generation. By inhibiting the generation of color formed by oxidation of the chromogenic indicator, the indicator's usefulness in discriminating between varying concentrations of analyte is enhanced.

Abstract: Disclosed are trans-2-substituted-amido-hexahydrobenzo[a]quinolizines represented by the formula: ##STR1## In the above formula, R.sup.1 and R.sup.2 are independently --H or --OCH.sub.3 or when taken together are ##STR2## R.sup.3 is --H or --CH.sub.3 and R.sup.4 is ##STR3## These compounds, and their pharmacologically acceptable, non-toxic, acid addition salts are useful as anti-hypertensive agents.

Abstract: Disclosed are novel 2-substituted anilino-hexahydrobenzo[a]quinolizines of the formula: ##STR1## wherein R and R' are independently H or --OCH.sub.3 and R" is ##STR2## These compounds, and their pharmacologically acceptable, non-toxic acid addition salts are useful as anti-hypertensive agents. Certain of the compounds disclosed herein elicit this effect without producing concomitant cardiac stimulation.

Abstract: Derivatives of 5-(indol-3-yl)hydantoin characterized by the generic structural formula, ##STR1## and their pharmacologically compatible salts are useful in the treatment of cardiac arrythmias in individuals for whom such therapy is indicated. In the preceding structural formula, A is a hydrogen atom, a halogeno, alkyl, hydroxyl, or an alkoxyl radical; n is 0 or 1; R is a hydrogen atom or a phenyl group; X is a methylene, ethylene, trimethylene, or 2-hydroxytrimethylene radical; and Z is a monoalkylamino radical containing 1-4 carbon atoms, a dialkylamino radical containing 2-8 carbon atoms, a morpholino, piperid-1-yl, 4-phenyl-piperid-1-yl, or a 4-hydroxy-4-phenyl-piperid-1-yl radical.