Portosin

{{Short description|Class of chemical compounds}} {{other uses|Portosín}} [[File:Portosins.PNG|thumb|right|General structure of portosins, with R1 being O-CH3, R2 being O-CH3, OH or H, R3 being glucose, coumaroylglucose or acetylglucose and R4 being catechin, phenol or a procyanidin dimer.]] '''Portosins''' are vinylpyranoanthocyanins, a type of blueish phenolic pigments, found in aged port wine.<ref>{{Cite journal|pmid=15577193|year=2004|last1=Mateus|first1=N|last2=Oliveira|first2=J|last3=Haettich-Motta|first3=M|last4=De Freitas|first4=V|title=New Family of Bluish Pyranoanthocyanins|volume=2004|issue=5|pages=299–305|doi=10.1155/S1110724304404033|pmc=1082895|journal=Journal of Biomedicine & Biotechnology|doi-access=free}}</ref>

== See also == * Wine color

== References == {{Reflist}}

{{Pyranoanthocyanidin}}

Category:Pyranoanthocyanins

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