116679-83-5 4-fluorohexahydrosiladifenidol FHHSiD Silanol, cyclohexyl(4-fluorophenyl)(3-(1-piperidinyl)propyl)- p-F-Hhsid p-Fluoro-hexahydro-sila-difenidol p-Fluoro-hexahydro-sila-diphenidol p-Fluorohexahydrosiladyphenidol pFHHSiD