Abstract: The present invention includes novel compounds of the formula (I) wherein X is absent or trans or cis CHCH, R1 is (C1-C10) alkyl unsubstituted or substituted by one to three hydroxy, (C1-C10) alkenyl unsubstituted or substituted by one to three hydroxy, (C1-C10) alkynyl unsubstituted or substituted by one to three hydroxy, or aryl unsubstituted or substituted by one to three hydroxy; R2 is hydrogen, alkyl or aryl; R3 and R4 are, independently of each other, H, halogen, or a solubilizing group, with the provisio that at least one of R3 and R4 is halogen; and pharmaceutically acceptable salts thereof. The invention also includes pharmaceutically acceptable formulations of said compounds which exhibit antibiotic activity against a wide spectrum of microorganisms including organisms which are resistant to multiple antibiotic families and are useful as antibacterial agents for treatment or prophylaxis of bacterial infections, or their use as antiseptics, agents for sterilization or disinfection.

Abstract: The present invention relates to compounds of the formula (1.0); and pharmaceutically acceptable salts of such compounds. The present invention relates to chemical entities containing a nitrofuran or other antibiotic linked to an activity enhancing distal ring system either directly or via an imine group, the vinyl group, the carbo- or hetero-cyclic chain or ring or a combination of an imine group or a vinyl group and a carbo- or hetero-cyclic chain or ring. Antibiotic activity is obtained, for example, by the nitrofuran moiety, while the remaining structure of the molecule contributes to additional antimicrobial activity and/or extends the antimicrobial spectrum of activity, by facilitating nitroreduction by microorganisms, uptake in target bacterial, and/or intracellular penetration, while also contributing to pharmacological properties (absorption, body distribution, and others).

Abstract: The present invention includes novel compounds of the formula wherein: X is absent, or trans or cis CHCH; R1 is (C1-C10)alkyl unsubstituted or substituted by one to three hydroxy, (C2-C10)alkenyl unsubstituted or substituted by one to three hydroxy, (C2-C10)alkynyl unsubstituted or substituted by one to three hydroxy, or aryl unsubstituted or substituted by one to three hydroxy; R2 is hydrogen, alkyl or aryl, wherein R1 and R2 when taken together form a (C2-C10)cycloalkyl unsubstituted or substituted by one to three hydroxy; and R3 and R4 are, independently of each other, H, halogen, or wherein: P and R are each independently selected from CH2, CH2CH2 and CH2CHT, wherein T is alkyl; Q is O, S, NH or NCH3; and Y is absent or —CH2CH2)nO—, and n=1 or 2; with the proviso that at least one of R3 and R4 is halogen, and that when R4 is halogen, R3 is hydrogen and Y is absent, neither R1 nor R2 are alkyl; or pharmaceutically acceptable salts thereof.

Abstract: The present invention includes novel compounds of the formula (I) wherein X is absent or trans or cis CHCH, R1 is (C1-C10) alkyl unsubstituted or substituted by one to three hydroxy, (C1-C10) alkenyl unsubstituted or substituted by one to three hydroxy, (C1-C10) alkynyl unsubstituted or substituted by one to three hydroxy, or aryl unsubstituted or substituted by one to three hydroxy; R2 is hydrogen, alkyl or aryl; R3 and R4 are, independently of each other, H, halogen, or a solubilizing group, with the provisio that at least one of R3 and R4 is halogen; and pharmaceutically acceptable salts thereof. The invention also includes pharmaceutically acceptable formulations of said compounds which exhibit antibiotic activity against a wide spectrum of microorganisms including organisms which are resistant to multiple antibiotic families and are useful as antibacterial agents for treatment or prophylaxis of bacterial infections, or their use as antiseptics, agents for sterilization or disinfection.

Abstract: The use of compounds of the milbemycin class as inhibitors of efflux pumps in microbes or other cells is described, along with pharmaceutical compositions incorporating a milbemycin. Also described is a method of screening for compounds which inhibit a CDR1, CDR2, BEN, or FLU1 efflux pump or a pump with components having a high level of protein level sequence similarity with the components of those efflux pumps.

Abstract: Compounds are described which have efflux pump inhibitor activity. Also described are methods of using such efflux pump inhibitor compounds and pharmaceutical compositions which include such compounds.

Abstract: Compounds are described which have efflux pump inhibitor activity. Also described are methods of using such efflux pump inhibitor compounds and pharmaceutical compositions which include such compounds.

Abstract: Compounds are described which have efflux pump inhibitor activity. Also described are methods of using such efflux pump inhibitor compounds and pharmaceutical compositions which include such compounds.

Abstract: Methods are provided for screening for inhibitors of microbial efflux pumps including those which export antibiotics. The screening methods are based on the increase in the intracellular concentration of a compound, such as an antibiotic, when the bacterial cells are contacted with an efflux pump inhibitor. In addition, this invention provides pharmaceutical compositions containing such efflux pump inhibitors, and methods for treating microbial infections using those compositions.