Pyranocoumarins are a class of chemical compounds that have a core structure that consists of a
pyran ring fused to a
coumarin. As
phytochemical
Phytochemicals are chemical compounds produced by plants, generally to help them resist fungi, bacteria and plant virus infections, and also consumption by insects and other animals. The name comes . Some phytochemicals have been used as poisons ...
s, pyranocoumarins are uncommon and found mainly the plant families
Apiaceae and
Rutaceae.
For example, ''
Citrus sinensis'' and ''
Citrus limonia
Rangpur, ''Citrus'' × ''limonia'' or ''Citrus reticulata'' × ''medica'', sometimes called the rangpur lime, mandarin lime or lemandarin, is a hybrid between the mandarin orange and the citron. It is a citrus fruit with a very acidic taste an ...
'' are sources of
xanthyletin and
seselin.
In the biosyntheses of pyranocoumarins, the pyran ring is formed via the
methylerythritol phosphate pathway and the coumarin is derived from the
shikimate pathway.
[
]
See also
* Furanocoumarin
References
Pyrans
Coumarins
Heterocyclic compounds with 3 rings
{{organic-compound-stub