(2S)-1-[(2S,4R)-4-benzyl-2-hydroxy-5-{[(1S,2R,5S)-2-hydroxy-5-methylcyclopentyl]amino}-5-oxopentyl]-N-tert-butyl-4-{[6-chloro-5-(4-methylpiperazin-1-yl)pyrazin-2-yl]carbonyl}piperazine-2-carboxamide
(2s)-1-[(2s,4r)-4-benzyl-2-hydroxy-5-{[(1s,2r,5s)-2-hydroxy-5-methylcyclopentyl]amino}-5-oxopentyl]-n-tert-butyl-4-{[6-chloro-5-(4-methylpiperazin-1-yl)pyrazin-2-yl]carbonyl}piperazine-2-carboxamide