143120-92-7 24008-92-2 6037-45-2 D-Galacturonic acid, O-alpha-D-galactopyranuronosyl-(1-4)-O-alpha-D-galactopyranuronosyl-(1-4)- Gala-(1-4)-gala-(1-4)-gala O-Galactopyranosyluronic acid-(1-4)-O-galactopyranosyluronic acid-(1-4)-galactopyranosyluronic acid Trigalacturonic acid alpha-Gala-gala-gala