SPDS 09052014

Background: Anthocyanidins (Anthocyanin Aglycones)

Anthocyanidin

R1

R2

Pelargonidin

H

H H

Cyanidin

OH OH

Delphinidin

OH

Peonidin

OCH3 OCH3 OCH3

H

Petunidin

OH

Malvidin

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