Chemical constituents from <italic>Bletilla striata</italic> and their NO production suppression in RAW 264.7 macrophage cells.

A novel glucoside bletilloside A (<bold>1</bold>) was isolated from the tubers of <italic>Bletilla striata</italic>, together with seven known compounds (<bold>2</bold>-<bold>8</bold>). Their structures were determined on the basis of extensive spectroscopic analyses. All compounds were evaluated for the inhibition on NO production effects in RAW 264.7 macrophage cells, while militarine (<bold>4</bold>) and dactylorhin A (<bold>5</bold>) exhibited moderate inhibitory effects. [ABSTRACT FROM AUTHOR]