Abstract: The present invention provides a compound of formula (I), and its use in methods of treatment, including the treatment of bacterial infections. Methods for the preparation of the compound of formula (I) are also provided.

Abstract: Provided are compounds of formula (III), and the use of compounds of formula (III) in methods of treatment, such as methods of treating a microbial infection. The compounds of formula (III) is: where —R15 is an amino-containing group: and —R1, —R2, —R3, —R4, —R8, —RA, Q, —R16, —R17 are as described in further detail in the description.

Abstract: The invention provides a polymyxin compound of formula (I) and salts, solvates and protected forms thereof, pharmaceutical compositions comprising the compounds of formula (I), and the use of the compounds and compositions in methods of treatment, such as methods for the treatment of microbial infections. The compounds of formula (I) are represented thus: wherein —R15 is a group: and —R16 is hydrogen; —R17 is hydrogen; -L- is a covalent bond or methylene; and —Ar is optionally substituted aryl. The groups —X—, —R1, —R2, —R3, —R4, and —R8 are as defined herein.

Abstract: The invention provides a polymyxin compound of formula (I) and salts, solvates and protected forms thereof, pharmaceutical compositions comprising the compounds of formula (I), and the use of the compounds and compositions in methods of treatment, such as methods for the treatment of microbial infections. The compounds of formula (I) are represented thus: wherein —R15 is a group: and —R16 is hydrogen; —R17 is hydrogen -L- is a covalent bond or methylene; and —Ar is optionally substituted aryl. The groups —X—, —R1, —R2, —R3, —R4, and —R8 are as defined herein.

Abstract: The invention provides a polymyxin compound of formula (I) and salts, solvates and protected forms thereof, pharmaceutical compositions comprising the compounds of formula (I), and the use of the compounds and compositions in methods of treatment, such as methods for the treatment of microbial infections. The compounds of formula (I) are represented thus: wherein —R15 is a group: and —R16 is hydrogen; —R17 is hydrogen -L- is a covalent bond or methylene; and —Ar is optionally substituted aryl. The groups —X—, —R1, —R2, —R3, —R4, and —R8 are as defined herein.

Abstract: Provided are compounds of formula (III), and the use of compounds of formula (III) in methods of treatment, such as methods of treating a microbial infection. The compounds of formula (III) is: where —R15 is an amino-containing group: and —R1, —R2, —R3, —R4, —R, —RA, Q, —R16, —R17 are as described in further detail in the description.

Abstract: Described are compounds of formula (I) for use in combination treatment with a second active agent, such as rifampicin, for example for treatment of a microbial infection. The compound of formula (I) is a polymyxin compound is: where the groups -A-, —R1, —R2, —R3, —R4, —R5, —R6, —R7, —R8, and —X— are described in detail within the description.

Abstract: The present invention provides a compound of formula (I), and its use in methods of treatment, including the treatment of bacterial infections. Methods for the preparation of the compound of formula (I) are also provided.

Abstract: Provided are compounds of formula (III), and the use of compounds of formula (III) in methods of treatment, such as methods of treating a microbial infection. The compounds of formula (III) is: where —R15 is an amino-containing group: and —R1, —R2, —R3, —R4, —R8, —RA, Q, —R16, —R17 are as described in further detail in the description.

Abstract: Described are compounds of formula (I) for use in combination treatment with a second active agent, such as rifampicin, for example for treatment of a microbial infection. The compound of formula (I) is a polymyxin compound is: where the groups -A-, —R1, —R2, —R3, —R4, —R5, —R6, —R7, —R8, and —X— are described in detail within the description.