Methanesulfonic acid 3-((3aS,5aR,8aR,8bS)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-3a-yl)-propyl ester

2,3:4,5-bis-O-(isopropylidene)-D-fructopyranose aldehyde