benzyl tert-butyl (R)-2-phthalimidooxysuccinate

(R)-N-[(2R,3R,4S,5R,6R)-3,4-Diacetoxy-6-acetoxymethyl-5-((2S,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yl]-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yloxy)-succinamic acid benzyl ester