Abstract: Compounds of formula (I): ##STR1## wherein: R.sup.1 represents a lower alkyl group selected from methyl groups and ethyl groups;R.sup.2 represents a hydrogen atom or a methyl group; andR.sup.3 represents a group selected from C.sub.1 --C.sub.5 alkoxy groups,and pharmaceutically acceptable acid addition salts thereof have valuable antibiotic activity and are suitable for oral administration. They may be prepared by a variety of synthetic routes.

Abstract: Compounds of formula (I): ##STR1## (wherein: R.sup.1 represents an optionally substituted alkyl, cycloalkyl, aryl, partially hydrogenated aryl or heterocyclic group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 represent hydrogen or an optionally substituted alkyl, cycloalkyl, aralkyl, aryl, heterocyclic or heterocyclic-alkyl group or any adjacent pair thereof form a cyclic structure, at least one not being hydrogen; A represents a bond, or a methylene, ethylene, oxymethyl or thiomethyl group; B represents an alkylene, alkylidene, cycloalkylene or cycloalkylidene group; and n is 0, 1 or 2) and salts and esters thereof are hypotensive agents.

Abstract: Compounds of formula (I): ##STR1## wherein: R.sup.1 represents a lower alkyl group selected from methyl groups and ethyl groups;R.sup.2 represents a hydrogen atom or a methyl group; andR.sup.3 represents a group selected from C.sub.1 -C.sub.5 alkoxy groups,and pharmaceutically acceptable acid addition salts thereof have valuable antibiotic activity and are suitable for oral administration. They may be prepared by a variety of synthetic routes.

Abstract: The compounds of the formula (I): ##STR1## wherein: R.sup.1 represents a hydrogen atomandR.sup.2 represents a --C(CH.sub.3).sub.3 group; and pharmaceutically acceptable acid addition salts thereof. The invention also provides antibiotics suitable for oral administration containing at least one of said compound and salts.

Abstract: A document hold-down device in a copying apparatus includes a rectangular relatively stiff plate and a relatively stiff anchoring bar spaced from and parallel to the plate rear edge, the bar and plate being sandwiched between flexible synthetic resin sheets which envelope the bar and plate and are bonded to each other along their coinciding borders and preferrably along a hinge defining line intermediate the proximate edges of the sheet and bar. Fastening members releasably anchor the bar to the apparatus proximate the document support plate. Advantageously, to accommodate thick documents, a second bar is disposed between the anchoring bar and plate and enveloped between the flexible sheets which are bonded to each other along hinge lines along opposite sides of the second bar. A resilient sponge sheet may underlie the plate to accommodate uneven documents.