Abstract: Rifamycin antibiotic derivatives of formulae (I) and (Ia) bearing at the position 36 a substituent selected from (C.sub.1 -C.sub.8)alkyl, halo, hydroxy, (C.sub.1 -C.sub.4)acyloxy, (C.sub.1-C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)alkylamino, di(C.sub.1-C.sub.4)alkylamino and substituted 4-oxo-3-pyridinyl carbonyloxy of formula (1) obtained by reacting rifamycin with suitably substituted malonic acid. The compounds of the invention are antimicrobial agents mainly active against gram positive bacteria and fastidious gram negative bacteria showing the considerable antimicrobial activity against the rifamypicin resistant microbial strains.

Abstract: A solid rifapentine hydrohalide useful for anti-bacterial purposes.

Abstract: The present invention refers to new s-triazolo[3,4-a]phthalazine derivatives, to the process for their preparation and to the pharmaceutical compositions containing them.

Abstract: The present invention is directed to new 3,6-disubstituted-1,2,4-triazolo[3,4-a]phthalazine derivatives of formula I ##STR1## wherein R represents phenyl or substituted phenyl, n is 1 or 2, R.sup.1 is an amino group of formula NR.sup.4 R.sup.5, or an alkoxy of cycloalkoxy group of formula OR.sup.6, and R.sup.2 and R.sup.3 represent hydrogen, halogen, (C.sub.1 -C.sub.4)alkyl or (C.sub.1 -C.sub.4)alkoxy, to the process for their preparation and to the pharmaceutical compositions containing them. The compounds of the present invention are as active as anti-anxiety substances.

Abstract: New 2,4,6-trisubstituted-2,3-dihydro-benzofuran derivatives of the following general formula ##STR1## wherein R is selected from hydrogen or methyl; one of R.sub.1 and R.sub.2 represents hydroxy, (C.sub.1-4)alkoxy or (C.sub.2-4)alkanoyloxy, and the other one is selected from cyano, carboxy, carbo(C.sub.1-4)alkoxy, carbamoyl and a --NR.sub.3 R.sub.4 group, wherein R.sub.3 and R.sub.4 independently represent hydrogen (C.sub.1-4)alkyl, (C.sub.2-4)alkanoyl, carbo(C.sub.1-4)alkoxy, carbobenzyloxy, carbamoyl, mono- and di-(C.sub.1-4)alkylamino-(C.sub.1-4)alkyl, benzenesulfonyl, toluenesulfonyl, (C.sub.1-4)alkylsulfonyl or phenacylsulfonyl; and salts therewith of pharmaceutically acceptable acids. The compounds have antinflammatory, analgesic and antipyretic utility.

Abstract: New reserpine-like compounds of the general formula ##SPC1##Wherein R is a member of the class consisting of hydrogen, lower alkyl, lower alkenyl and acyl; R.sub.1 is selected from hydrogen and lower alkyl, and R.sub.2 is hydrogen or lower alkyl. The new reserpine-like compounds are useful anti-hypertensive agents.