Cleistanthin B is a member of the class of cleistanthins that is cleistanthin A in which the 3,4-di-O-methyl-D-xylopyranosyl group is replaced by a beta-D-glucopyranosyl group. It has a role as a diuretic, an antihypertensive agent and an alpha-adrenergic antagonist. It is a beta-D-glucoside, a monosaccharide derivative and a member of cleistanthins.