Background:
Anthocyanidins (Anthocyanin Aglycones)
Anthocyanidin
R1
R2
Pelargonidin
H
H
Cyanidin
OH
H
Delphinidin
OH
OH
Peonidin
OCH3
H
Petunidin
OCH3
OH
Malvidin
OCH3
OCH3
R3, R4
= OH
Background:
Anthocyanins Structures
•
Common R3 Substitutions:
–
Simple Sugars (Glucoside, Arabinoside, Galactoside)
–
Oligosaccharides (Rutinoside, Sambubioside,
Sophoroside, Glucosylrutinoside)
–
Glycoside Acylation – Coumarate, Acetate, Oxalate
•
Common R4 Substitutions:
OH
–
–
Glucoside
•
>
500 anthocyanin known pigments, >50 in common
foods
