SEARCH Articles Figures Tables Carotenoid Syntheses by means of Wittig Olefination Carotenoid Syntheses not involving any Wittig Olefination Olefin synthesis Olefin synthesis Wittig reaction Olefinated Wittig methylenation, synthesis Olefinations, synthesis Wittig olefin Wittig olefination Wittig olefination in nakafuran-9 synthesis Wittig olefination synthesis Wittig olefination synthesis Wittig synthesis