{HEAD ~ Esters} of {TAIL ~ low molecular alkanoic acids}, such as C1 to C5 carboxylic acids, of low molecular alkanols, such as C1 C5 alkanols, are favored 
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{ HEAD ~ Esters } of { TAIL ~ low molecular alkanoic acids } , such as C1 to C5 carboxylic acids , of low molecular alkanols , such as C1 C5 alkanols , are favored
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH