ChEBI

Definition : Any of the lignans with a 9-aryl-1-oxo-1,3-dihydronaphtho[2,3-c]furan-4-yl glycoside skeleton originally isolated from Cleistanthus collinus, a toxic deciduous shrub. While all parts of the plant are poisonous, the leaves in particular are used as a suicide poison by young women in rural parts of southern India. Cleistanthins A and B have been particularly associated with the toxicity of the plant, with cleistanthin A being more potent than cleistanthin B.

Definition : Any member of the class of organooxygen compounds that is a polyhydroxy-aldehyde or -ketone or a lactol resulting from their intramolecular condensation (monosaccharides); substances derived from these by reduction of the carbonyl group (alditols), by oxidation of one or more hydroxy groups to afford the corresponding aldehydes, ketones, or carboxylic acids, or by replacement of one or more hydroxy group(s) by a hydrogen atom; and polymeric products arising by intermolecular acetal formation between two or more such molecules (disaccharides, polysaccharides and oligosaccharides). Carbohydrates contain only carbon, hydrogen and oxygen atoms; prior to any oxidation or reduction, most have the empirical formula Cm(H2O)n. Compounds obtained from carbohydrates by substitution, etc., are known as carbohydrate derivatives and may contain other elements. Cyclitols are generally not regarded as carbohydrates.