(2r)-2-acetamido-3-((5-hydroxy-2-pentyltetrahydrofuran-3-yl)thio
3-amino-n-((tetrahydrofuran-2-yl)methyl)propanamide
5-amino-2-(((tetrahydrofuran-2-yl)methyl)amino)benzoic acid
(s)-tert-butyl((5-oxotetrahydrofuran-2-yl)methyl)carbamic acid
(s)-methyl 3-hydroxy-5-oxotetrahydrofuran-3-carboxylate