1) Botanical drug 
Acemannan is a D-isomer mucopolysaccharide in aloe vera leaves. This compound has been known to have immunostimulant, antiviral, antineoplastic and gastrointestinal properties. == Chemical structure and properties == Acemannan`s monomer is mannoacetate linked by β-1,4-glycosidic bonds. This polymer is hydrophilic: It has 50 hydrogen bond accepto....