Abstract: Compounds corresponding to the following general formula: ##STR1## wherein Ar and Ar.sup.1, which may be the same or different, each represents an aromatic radical which may be substituted one or more times by halogen and/or nitro and/or lower alkyl and/or trihalomethyl and/or cyano and/or lower alkoxy and/or di-lower alkyl-amino, the alkyl groups optionally completing a ring optionally incorporating a further heteroatom, and/or lower alkyl sulphonyl;Alk.sup.1 and Alk.sup.2, which may be the same or different, each represents an alkylene group containing from one to eight carbon atoms which may be substituted one or more times by aryl and/or cycloalkyl and/or lower alkyl and if two such alkyl groups are present, they may complete a ring optionally containing a heteroatom and in which imidazole ring may be further substituted; and m represents 0 or 1; provided that not both Ar and Ar.sup.1 represent phenyl; and acid addition salts thereof.

Abstract: A plasmid having an insertion site for a eukaryotic DNA fragment adjacent to a bacterial promoter and downstream from a prokaryotic ribosome binding site and initiator codon such that the bacterial promoter controls transcription and translation of an inserted DNA fragment is disclosed.The production and use of such plasmids is also disclosed.In general terms, one aspect of the present invention relates to a series of plasmid vectors having the basic characteristic of a Hind III insertion site adjacent to a tryptophan promoter and also a gene for tetracycline resistance. The plasmid vectors are by virtue of the structure thereof ideally suited to receive at the Hind III site an inserted eukaryotic DNA fragment the transcription and translation of which is under the control of the tryptophan promotor.

Abstract: 11-Amino-11-deoxydaunorubicin and analogs represented by the formula: ##STR1## wherein: R is hydrogen, hydroxy or methoxy; R.sub.1 is hydrogen or hydroxy; and the pharmaceutically acceptable salts thereof.The compounds are useful in ameliorating tumor growth.