Abstract: There is disclosed a stable formulation of enalapril salt of the formula I ##STR1## which is prepared in such manner that a compound of formula II ##STR2## is suspended in demineralized water and a stoichiometric amount of the corresponding sodium compound such as sodium carbonate, sodium hydrogen carbonate or sodium hydroxide is added thereto, to this enalapril sodium salt prepared in situ of the formula I ##STR3## formulating additives are added, the whole is homogenized and formulated.

Abstract: There is suggested a new process for the isolation of chicken egg white cystatin from an aqueous solution of chicken egg white by means of heating to max. 80.degree. C., chromatography on carboxymethylated papain-Sepharose 4B, chromatography on Sephadex-G-50 and purification by means of ion exchange chromatrography of the Fast Protein Liquid Chromatrography type. There are further suggested new agents and methods of treating viral infections in living organisms, especially mammalian and avian picornaviral infections, by means of chicken egg white cystatin.

Abstract: There is disclosed a process for preparing 9-(2-hydroxyethoxymethyl)-guanine (acyclovir) of the formula IV ##STR1## wherein a novel compound of the formula I ##STR2## wherein R and R' may be the same or different and represent hydrogen, (C.sub.1 -C.sub.8)acyl or benzyl and R.sub.1 represents (C.sub.1 -C.sub.8)acyl, is hydrolyzed basic conditions. Also disclosed is the novel compound of the formula I, a process for the preparation thereof by condensing a novel compound of the formula II ##STR3## with a compound A--CH.sub.2 --O--CH.sub.2 CH.sub.

Abstract: There is disclosed a process for preparing 9-(2-hydroxyethoxymethyl)-guanine (acyclovir) of the formula IV ##STR1## wherein a novel compound of the formula I ##STR2## wherein R and R' may be the same or different and represent hydrogen, (C.sub.1 -C.sub.8)acyl or benzyl and R.sub.1 represents (C.sub.1 -C.sub.8)acyl, is hydrolyzed under mild basic conditions. Also disclosed is the novel compound of the formula I, a process for the preparation thereof by condensing a novel compound of the formula II ##STR3## with a compound A--CH.sub.2 --O--CH.sub.2 CH.sub.

Abstract: A process for preparing N-(2-pyridyl)-2-methyl-4-hydroxy-2H-1,2-benzothiazine-3-carboxamide-1,1-di oxide which comprises reacting an alkyl-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate-1,1-dioxide with P-phenyl-N,N'-di-2-pyridylphosphonium diamide.

Abstract: Process for the resolution of certain racemic .alpha.-aminonitriles into optically active enantiomers which includes treating the racemic .alpha.-aminonitriles with (-)-mandelic acid in an alkanol/C.sub.5-8 hydrocarbon mixture to obtain a racemic mixture of diastereoisomeric D and L salts of (-)-mandelic acid, macerating the salts with an alkanol/C.sub.5-8 hydrocarbon mixture; neutralizing the L-form; extracting the neutralized product; and converting it into a stable form.

Abstract: Process for the resolution of certain racemic .alpha.-aminonitriles into optically active enantiomers which includes treating the racemic .alpha.-aminonitriles with (-)-dibenzoyl-tartaric acid in polar solvents to obtain a racemic mixture of diastereoisomeric D and L salts of (-)-dibenzoyl-tartaric acid, macerating the salts with dioxane, neutralizing the L-form, extracting the neutralized product, and converting it into a stable form.