Portosin

For other uses, see Portosín.

Portosins are vinylpyranoanthocyanins, a type of blueish phenolic pigments, found in aged port wine.^[1]

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.

See also

• Wine color