e/QS21

Information
has gloss	eng: QS-21 is a purified plant extract that enhances the ability of the immune system to respond to vaccine antigens. It is derived from the Soap bark tree (Quillaja saponaria), which is native to the country of Chile.
lexicalization	eng: QS21
instance of	(noun) a group of compounds derived from monosaccharides glycoside