benzyl 2,3-dimethoxyphenyl(methyl)carbamate

(4-Hydroxy-7,8-dimethoxy-2-oxo-1,2-dihydro-quinolin-3-yl)-acetic acid

8,9-dimethoxy-3,4,5,10-tetrahydro-2,2,10-trimethyl-5-oxo-2H-pyrano(2,3-b)quinoline

(Z)-2-(4-hydroxy-7,8-dimethoxy-2-oxo-1,2-dihydroquinolin-3-yl)-4-methylpent-2-enoic acid

4-Hydroxy-7,8-dimethoxy-3-[2-methyl-prop-(E)-ylidene]-3H-furo[2,3-b]quinolin-2-one