27597-77-9 4-(4-Dimethylaminophenylazo) beta-lactoside Glucopyranoside, p-((p-(dimethylamino)phenyl)azo)phenyl 4-O-beta-D-galactopyranosyl-, beta-D- beta-D-Glucopyranoside, 4-((4-(dimethylamino)phenyl)azo)phenyl 4-O-beta-D-galactopyranosyl-