Bioactive constituents of Chinese natural medicines. I. New sesquiterpene ketones with vasorelaxant effect from Chinese Moxa, the processed leaves of Artemisia argyi Levl. et Vant.: moxartenone and moxartenolide - Masayuki,Y.; Hiromi,S.; Hisashi,M.; Johji,Y.; Nobutoshi,M. (Chem Pharm Bull, 1996)