(1S,2R,3S,4R)-4-amino-2,3-dihydroxycyclopentanecarboxylic acid

(1R,2R,3R,4R)-1-tert-butoxycarbonylamino-2-hydroxy-3,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-4-hydroxymethylcyclopentane