The acid function may also be converted to {HEAD ~ an alcohol}, aldehyde or ketone or derivatives thereof, or may be reduced to {TAIL ~ CH3} 
The acid function may also be converted to { HEAD ~ an alcohol } , aldehyde or ketone or derivatives thereof , or may be reduced to { TAIL ~ CH3 }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL