(+)-<1α,4α,5α,7S*>-5-Bromo-7-<(methoxymethoxy)-methyl>spiroheptane-2,2'-<1,3>dioxolane>-7-methanol

(1α,4α,5α,7R*)-5-Bromo-7-(fluoromethyl)-7-formylspiro-heptane-2,2'-<1,3>dioxolane>