2,2,2-Trichloro-N-[(3aR,5S,6S,6aR)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-6-((R)-1-hydroxy-ethyl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl]-acetamide

(1'R,3'R,4S,5S)-3-benzyl-1',3'-dihydroxy-5-methyl-6'-(trimethylsilyl)-3a',4'-dihydro-1'H-spiro[oxazolidine-4,2'-pentalene]-2,5'(3'H)-dione