132895-20-6 Mcbs-2,4-S Methyl alpha-carrabioside 2,4'-sulfate Methylcarrabioside 2,4'-disulfate alpha-D-Galactopyranoside, methyl 3,6-anhydro-4-O-(4-O-sulfo-beta-D-galactopyranosyl)-, 2-(hydrogen sulfate), dipotassium salt