6,7-Dimethoxy-3-[2-methyl-prop-(Z)-ylidene]-3,5-dihydro-furo[3,2-c]quinoline-2,4-dione

柠檬苦素

(3-甲基丁-2-烯基)丙二酸二乙酯

2,3-dimethoxy-N-methylaniline

4-hydroxy-7,8-dimethoxy-3-(3-methyl-but-2-enyl)-1H-quinolin-2-one