| abstract |
According to the present invention there is provided a compound of formula (I) or a quaternarized derivative of NR < 1 > group: (I) (Wherein A is a C 2-8 alkylene group; R 1 , R 2 , R 3 , and R 4 are independently selected from hydrogen, C 1-4 alkyl, and C 2-4 dihydroxyalkyl, Wherein the carbon atom attached to the nitrogen atom does not have a hydroxyl group and the carbon atom is not substituted by two hydroxyl groups or R 2 and R 3 together with the nitrogen atom to which R 2 and R 3 are attached Form a C 2-6 alkylene group, which forms a heterocycle ring; X 1 , X 2 and X 3 are independently hydrogen, hydroxyl, NR 1 -A-NR 2 R 3 R 4 + (Z m - ) 1 / m , halogenoamino, C 1-4 alkoxy and C 2-8 alkanoyloxy; (Z m - ) 1 / m is an anion of charge m). |