2-Hydroxy-1,5-naphthyridine

tert-butyl 2-hydroxy-7,8-dihydro-1... 

2-Hydroxy-5,6,7,8-tetrahydro-[1,6]... 

ethyl 4-hydroxy-1-(2-methoxyethyl)... 

ethyl 4-hydroxy-7-methyl-2-oxo-1-(... 

ethyl 4-hydroxy-1-isopentyl-7-meth... 

ethyl 1-allyl-4-hydroxy-7-methyl-2... 

ethyl 4-hydroxy-7-methyl-2-oxo-1-p... 

ethyl 1-benzyl-4-hydroxy-7-methyl-... 

ethyl 4-hydroxy-7-methyl-2-oxo-1-p... 

ethyl 4-hydroxy-1-isopropyl-7-meth... 

ethyl 4-hydroxy-1,7-dimethyl-2-oxo... 

ethyl 4-hydroxy-7-methyl-2-oxo-1,2... 

ethyl 4-hydroxy-1-(2-methoxyethyl)... 

ethyl 4-hydroxy-2-oxo-1-(prop-2-yn... 

ethyl 4-hydroxy-1-isopentyl-2-oxo-... 

ethyl 1-allyl-4-hydroxy-2-oxo-1,2-... 

ethyl 4-hydroxy-2-oxo-1-propyl-1,2... 

ethyl 1-benzyl-4-hydroxy-2-oxo-1,2... 

ethyl 4-hydroxy-2-oxo-1-phenyl-1,2... 

ethyl 4-hydroxy-1-isopropyl-2-oxo-... 

ethyl 4-hydroxy-1-methyl-2-oxo-1,2... 

ethyl 4-hydroxy-2-oxo-1,2-dihydro-... 

ethyl 2-hydroxy-5,6,7,8-tetrahydro...