Methoxylated flavones and coumarins from Artemisia annua

Chinese grown Artemisia annua contained 14 known methoxylated flavonoids and three new naturally occurring compounds: quercetagetin-3-methyl ether, 5,2′4′-trihydroxy-6,7,5′trimethoxyflavone and 5,7,8,3′-tetrahydroxy-3,4′-dimethoxyflavone. Four known commonly occurring coumarins were also isolated.