1-(1-(2-(7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)-3-(4-methoxyphenyl)urea

1-(1-(2-(7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)-3-(p-tolyl)urea

tert-butyl 4-(2-(7-methoxy-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperazine-1-carboxylate

7-methoxy-1-(2-(piperazin-1-yl)ethyl)-1,5-naphthyridin-2(1H)-one