Naturally occurring 5-lipoxygenase inhibitor. II. Structures and syntheses of ardisianones A and B, and maesanin, alkenyl-1,4-benzoquinones from the rhizome of Ardisia japonica - Fukuyama,Y.; Kiriyama,Y.; Okino,J.; Kodama,M.; Iwaki,H.; Hosozawa,S. (Chem Pharm Bull (Tokyo), 1993)