1 24O (1r,2r)-2-[(1s,2s)-2-amino-1-hydroxy-4-methylpentyl]-4-oxocyclopentanecarboxylic acid 1.000 2 24M (1r,2r)-2-[(1s,2s)-2-amino-1-hydroxy-4-methylpentyl]cyclopentanecarboxylic acid 0.941