A Wittig reaction employing Li (CD3) 2CP (C6H5) 3 was used to prepare d6-farnesol and d6- geranylgeraniol. Reductive amination of aniline-2, 3, 4, 5, 6-d5 was used to prepare the unnatural isoprenoid analogues d5-anilinogeraniol and d5-anilinofarnesol. All of these deuterated isoprenols were elaborated into their diphosphate and cysteine thioether derivatives suitable for use as stable-isotope labeled standards for quantitative mass ...