{HEAD ~ The alkyl ester} of these and {TAIL ~ other polybasic acids} are suitable for use in the present invention 
{ HEAD ~ The alkyl ester } of these and { TAIL ~ other polybasic acids } are suitable for use in the present invention
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH