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{4-[(Tert-butoxycarbonyl-isopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{3-[(Tert-butoxycarbonyl-isopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

[3-(Tert-butoxycarbonyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

[(R)-3-(tert-butoxycarbonyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

[(S)-3-(tert-butoxycarbonyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

[4-(Tert-butoxycarbonyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

{2-[(Tert-butoxycarbonyl-cyclopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{3-[(Tert-butoxycarbonyl-cyclopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{4-[(Tert-butoxycarbonyl-cyclopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

[1-(2-Hydroxy-ethyl)-piperidin-3-yl]-carbamic acid benzyl ester

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