Fmoc-L-Leu-OH-d10 is the labeled analogue of Fmoc-L-Leu-OH (F625015), an amino acid derivative, used in peptide chemistry. It is also one of the novel PPARγ ligands that can activate PPARγ in different ways, that reduces osteoclasts differentiation, and thus are better therapeutic targets in diabetes than traditional antidiabetic drugs.