1-cyclopentyl-3-(7-hydroxy-1,5-naphthyridin-2-yl)urea

1-cyclopentyl-3-(7-formyl-1,5-naphthyridin-2-yl)urea

ethyl 4-(6-(3-cyclopentylureido)-1,5-naphthyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazole-3-carboxylate

1-cyclopentyl-3-(7-(3-(hydroxymethyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)-1,5-naphthyridin-2-yl)urea

1-(7-(1-(azetidin-3-yl)-1H-pyrazol-4-yl)-1,5-naphthyridin-2-yl)-3-cyclopentylurea hydrochloride