''Gnetum cleistostachyum'' is a liana species in the ''Sessiles'' subsection of the genus ''
Gnetum
''Gnetum'' is a genus of gymnosperms, the sole genus in the family Gnetaceae within the Gnetophyta. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms, they possess vessel elements in the xylem. Some species have bee ...
'' described from South East Yunnan.
The name is still invalid and
efloras states it is advisable to postpone validating it until more complete collections, particularly with seeds, can be studied.
The stilbene derivatives, ,
B and
C,
gnetifolin A,
p-hydroxycinnamic acid,
piceatannol
Piceatannol is the organic compound with the formula . Classified as a stilbenoid and a phenol, it is a white solid, although samples often are yellow owing to impurities.
Natural occurrences
Piceatannol and its glucoside, astringin, are foun ...
,
resveratrol
Resveratrol (3,5,4′-trihydroxy-''trans''-stilbene) is a stilbenoid, a type of natural phenol or polyphenol and a phytoalexin produced by several plants in response to injury or when the plant is under attack by pathogens, such as bacterium, ba ...
, , , , the
stilbenolignans, , , , and ,
gnetucleistol D (2-methoxyoxyresveratrol),
gnetucleistol E (3-methoxy-isorhapontigenin),
rhapontigenin,
isorhapontigenin
Isorhapontigenin is a tetrahydroxylated stilbenoid with a methoxy group. It is an isomer of rhapontigenin and an analog of resveratrol. It is found in the Chinese herb ''Gnetum cleistostachyum'', in ''Gnetum parvifolium'' and in the seeds of the pa ...
,
4-methoxyresveratrol and
pinosylvin can be found in ''G. cleistostachyum''.
References
External links
Gnetaceae
Plants described in 1975
Flora of Yunnan
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