(2R,3R)-2,3-Bis-benzyloxymethyl-1,4-dioxa-spiro[4.4]non-6-ene

(3aR,4'R,5'R,6S,6aS)-4',5'-bis((benzyloxy)methyl)-6-bromo-2,2-dimethyltetrahydrospiro[cyclopenta[d][1,3]dioxole-4,2'-[1,3]dioxolane]

6-bromo-3,5-epoxy-1,2,3a,4,5,6,7,7a-octahydro-1,2-isopropylidenedioxy-4,7-methano-1H-indene