SEARCH Articles Figures Tables Horner-Wadsworth-Emmons Olefination - Still-Gennari Modification Olefinations Still-Gennari Stereoselectivity Still-Gennari olefination Still-Gennari modified HWE olefination Still-Gennari olefination Still-Gennari olefination diastereoselectivity Still-Gennari olefination reaction