1-Cgpe 4-O-(3,4-O-(1-Carboxyethylidene)-beta-galactopyranosyl)erithritol 87810-47-7 beta-D-Galactopyranoside, 2,3,4-trihydroxybutyl 3,4-O-(1-carboxyethylidene)-, (1(2R-(2R*,3S*)))-