ethyl 5-(5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)pentanoate

5-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-pentanoic acid methyl ester

乙基6-氧代庚酸酯

ethyl 5-(1,8-naphthyridin-2-yl)pentanoate

5-乙酰基戊酸