(3S,5S,6R,7R,8R,10S)-3-benzyloxycarbonylamino-6,7-epoxy-8-hydroxy-10-triethylsilyloxy-1-oxaspiro[4,5]dec-6-en-2-one

(3S,5S,6R,7S,8R,10S)-3-benzyloxycarbonylamino-8-(4-methylbenzenesulfonyl)-6,7-epoxy-10-triethylsilyloxy-1-oxaspiro[4,5]dec-6-en-2-one

(1S,2R,4S,5S,6R)-5-((S)-2-(((benzyloxy)carbonyl)amino)-3-hydroxypropyl)-5-hydroxy-4-((triethylsilyl)oxy)-7-oxabicyclo[4.1.0]heptan-2-yl 4-methylbenzenesulfonate