The present invention provides an aminopyridine compound selected from the group consisting of:(2S 4S) l [(3 chloro 2 fluoro phenyl)methyl] 4 [[3 fluoro 6 [(5 methyl lH pyrazol 3 yl)amino] 2 pyridyl]methyl] 2 methyl piperidine 4 carboxylic acid: [Formula should be inserted here] and (2R 4R) l [(3 chloro 2 fluoro phenyl)methyl] 4 [[3 fluoro 6 [(5 methyl lH pyrazol 3 yl)amino] 2 pyridyl]methyl] 2 methyl piperidine 4 carboxylic acid: [Formula should be inserted here] or a pharmaceutically acceptable salt thereof that inhibits Aurora A and therefore may be useful in treating cancer.