6-(2,5-dioxopyrrolidin-1-yl)hexanoic acid

ethyl 6-[(3,4,5-trimethoxybenzoyl)amino]hexanoate

tert-butyl 6-aminohexanoate

N-(1,3-benzodioxol-5-yl)-2-[3-chloro-2-oxo-5-(trifluoromethyl)pyridin-1-yl]acetamide

benzyl 6-aminohexanoate