Patent ID: 8273765

Claim:
A pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier and/or diluent, wherein R is an optionally substituted group selected from the group consisting of —COR′, —COOR′, —CONHR′, —CONR′R″, —NH—C(═NH)NHR′, —SO 2 NHR′ and —SO 2 NR′R″; R 1 is a hydrogen atom or an optionally substituted group selected from the group consisting of R′, —COR′, —COOR′, —CONHR′, —CONR′R″, —NH—C(═NH)NHR′, —SO 2 NHR′ and —SO 2 NR′R″; wherein R′ and R″ are the same or different and are, independently, hydrogen or optionally substituted straight or branched C 1 -C 6 alkyl, aryl, or aryl C 1 -C 6 alkyl, wherein when R′ is hydrogen R″ is not hydrogen, wherein when R″ is hydrogen R′ is not hydrogen and wherein when R 1 is hydrogen, R′ is not hydrogen; Ra, Rb, Rc and Rd are the same or different and are independently selected among hydrogen, or optionally further substituted straight or branched C 1 -C 6 alkyl, aryl, aryl C 1 -C 6 alkyl or —CH 2 OR′ groups, wherein R′ is as above defined, or Ra and Rb and/or Rc and Rd, taken together with the carbon atom to which they are bonded, form an optionally substituted C 3 -C 6 cycloalkyl group; m and n, each independently, represents 0 or an integer from 1 to 2, provided that m+n is lower than, or equal to, 2 (m+n≦2).