Patent ID: 7012144

Claim:
A quinolone carboxylic acid derivative of formula (I) or a pharmaceutically acceptable salt thereof: wherein, R 1 is a C 1-4 alkyl group, or a phenyl or C 3-6 cycloalkyl group optionally substituted with one or more halogens; R 2 is H, amino or C 1-4 alkyl group; R 3 is a, C 1-4 alkyl group, or amino, aminomethyl or aminoethyl group optionally substituted with one C 1-4 alkyl radical; W is N, CH or CY (Y is halogen, or C 1-4 alkyl or C 1-4 alkoxy group optionally substituted with one or more halogens); and Pyr represents 2-, 3- or 4-pyridyl.