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2-{4-[(tert-butoxy)carbonyl]-2-(propan-2-yl)piperazin-1-yl}acetic acid
2-[(2R)-4-[(tert-butoxy)carbonyl]-2-(propan-2-yl)piperazin-1-yl]acetic acid
2-[(2S)-4-[(tert-butoxy)carbonyl]-2-(propan-2-yl)piperazin-1-yl]acetic acid
2-[3-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(3S)-3-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(3R)-3-(2-methylpropyl)piperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-3-(2-methylpropyl)piperazin-1-yl}acetic acid
2-[(3S)-4-[(tert-butoxy)carbonyl]-3-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(3R)-4-[(tert-butoxy)carbonyl]-3-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[2-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(2R)-2-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(2S)-2-(2-methylpropyl)piperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-2-(2-methylpropyl)piperazin-1-yl}acetic acid
2-[(2R)-4-[(tert-butoxy)carbonyl]-2-(2-methylpropyl)piperazin-1-yl]acetic acid
2-[(2S)-4-[(tert-butoxy)carbonyl]-2-(2-methylpropyl)piperazin-1-yl]acetic acid
2-(3-phenylpiperazin-1-yl)acetic acid
2-[(3S)-3-phenylpiperazin-1-yl]acetic acid
2-[(3R)-3-phenylpiperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-3-phenylpiperazin-1-yl}acetic acid
2-[(3S)-4-[(tert-butoxy)carbonyl]-3-phenylpiperazin-1-yl]acetic acid
2-[(3R)-4-[(tert-butoxy)carbonyl]-3-phenylpiperazin-1-yl]acetic acid
2-(2-phenylpiperazin-1-yl)acetic acid
2-[(2R)-2-phenylpiperazin-1-yl]acetic acid
2-[(2S)-2-phenylpiperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-2-phenylpiperazin-1-yl}acetic acid
2-[(2R)-4-[(tert-butoxy)carbonyl]-2-phenylpiperazin-1-yl]acetic acid
2-[(2S)-4-[(tert-butoxy)carbonyl]-2-phenylpiperazin-1-yl]acetic acid
2-(3-benzylpiperazin-1-yl)acetic acid
2-[(3S)-3-benzylpiperazin-1-yl]acetic acid
2-[(3R)-3-benzylpiperazin-1-yl]acetic acid
2-{3-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl}acetic acid
2-[(3S)-3-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl]acetic acid
2-[(3R)-3-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl]acetic acid
2-(2-benzylpiperazin-1-yl)acetic acid
2-[(2R)-2-benzylpiperazin-1-yl]acetic acid
2-[(2S)-2-benzylpiperazin-1-yl]acetic acid
2-{2-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl}acetic acid
2-[(2R)-2-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl]acetic acid
2-[(2S)-2-benzyl-4-[(tert-butoxy)carbonyl]piperazin-1-yl]acetic acid
2-{3-[(1H-indol-3-yl)methyl]piperazin-1-yl}acetic acid
2-[(3S)-3-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-[(3R)-3-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-3-[(1H-indol-3-yl)methyl]piperazin-1-yl}acetic acid
2-[(3S)-4-[(tert-butoxy)carbonyl]-3-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-[(3R)-4-[(tert-butoxy)carbonyl]-3-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-{2-[(1H-indol-3-yl)methyl]piperazin-1-yl}acetic acid
2-[(2R)-2-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-[(2S)-2-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid
2-{4-[(tert-butoxy)carbonyl]-2-[(1H-indol-3-yl)methyl]piperazin-1-yl}acetic acid
2-[(2R)-4-[(tert-butoxy)carbonyl]-2-[(1H-indol-3-yl)methyl]piperazin-1-yl]acetic acid