Patent Number: 
Section: claims

1. A product of a process comprising the steps of:(a) Preparing a precursor solution comprising 2β-Carbomethoxy-3β-(4-fluorophenyl)-N-(3-tributyltin-E-allyl) nortropane), ethanol, hydrogen peroxide, and a phosphate buffer;(b) Preparing a sodium [1231]-iodide solution comprising sodium [1231]-iodide and trifluoroacetic acid having a pH of less than about 2;(c) Heating a mixture of said precursor solution and said sodium [123l]-iodide solution at a temperature of about 80° C. for about 15 minutes;(d) Eluting said resulting product [1231]-2β-carbomethoxy-3β-(4-flurophenyl)-N-(3-iodo-E-allyl) nortropane through a C18 preparative HPLC column with an eluent, wherein the eluent comprises about 15% (v/v) ethanol; and(e) Collecting product peak in a mixture of sodium chloride and an acetic acid buffer wherein said nortropane product is stable for at least 48 hours.