tert-Butyl 3-((((R)-1-Amino-1-oxobutan-2-yl)amino)methyl)hexanoate-d7 is a by-product intermediate during the synthesis of Brivaracetam-d7 (B677647). It is a labeled analogue of Brivaracetam, which is a 4-n-propyl analog of levetiracetam (L331500). It is also a racetam derivative with anticonvulsant properties.