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(2-Methyl-3-oxo-2,3-dihydro-pyridazin-4-yloxy)-acetic acid

(3-Oxo-2,3-dihydro-pyridazin-4-ylamino)-acetic acid

(1-Methyl-6-oxo-1,6-dihydro-pyridazin-4-ylamino)-acetic acid

(2-Methyl-3-oxo-2,3-dihydro-pyridazin-4-ylamino)-acetic acid

3-(2-Methyl-3-oxo-2,3-dihydro-pyridazin-4-yl)-propionic acid

[Methyl-(2-methyl-3-oxo-2,3-dihydro-pyridazin-4-yl)-amino]-acetic acid

(2-Methyl-3-oxo-2,3-dihydro-pyridazin-4-ylamino)-acetate ethyl ester

(2-Methyl-3-oxo-2,3-dihydro-pyridazin-4-ylamino)-acetate tert-butyl ester

(5-Methoxy-2-methyl-3-oxo-2,3-dihydro-pyridazin-4-ylamino)-acetic acid

(3,4-Dichloro-benzyl)-methyl-piperidin-4-yl-amine