7,11-anhydro-8,9,10,12-tetra-O-benzyl-7-N-benzyloxycarbonylamino-2-tert-butoxycarbonylamino-2,3,4,5,67-hexadeoxy-1-O,2-N-isopropylidene-L-threo-L-galacto-dodecitol

7,10-anhydro-7,8,11-tri-O-benzyl-7-N-benzyloxycarbonylamino-2-tert-butoxycarbonylamino-2,3,4,5,6,7-hexadeoxy-1-O,2-N-isopropylidene-D-talo-D-glycero-undecitol