The mol-ecule of the title compound, C(8)H(13)NO(6), a sucrose derivative, consists of two fused tetra-hydro-furan rings having the cis arrangement at the ring junctions, giving a V-shaped mol-ecule. An intra-molecular O-H⋯O inter-action occurs. Inter-molecular O-H⋯O hydrogen bonds help to stabilize the crystal structure.