4,6-O-Benzylidene-N-Boc-1,5-imino-D-glucitol

[2R-(2α,4aα,7α,8β,8aβ)]-Hexahydro-7,8-dihydroxy-2-phenyl-5H-1,3-dioxino[5,4-b]pyridine-5-carboxylic Acid 1,1-DiMethylethyl Ester