{HEAD ~ The process} involves {TAIL ~ the conversion} of mono oxygenated hydrocarbons, such as alcohols, ketones, aldehydes, furans, carboxylic acids, diols, triols, and other polyols, to C4+ hydrocarbons, alcohols and ketones, by condensation 
involves
{ HEAD ~ The process } involves { TAIL ~ the conversion } of mono oxygenated hydrocarbons , such as alcohols , ketones , aldehydes , furans , carboxylic acids , diols , triols , and other polyols , to C4 + hydrocarbons , alcohols and ketones , by condensation
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