1,2-O-(1-Methoxyethylidene)-beta-L-rhamnopyranose 1,2-O-(1-Methoxyethylidene)rhamnopyranose 6-Deoxy-1,2-O-(1-methoxyethylidene)-beta-L-Mannopyranose 80851-14-5 Meetrh beta-L-Mannopyranose, 6-deoxy-1,2-O-(1-methoxyethylidene)-