{TAIL ~ One embodiment} of the invention is directed to a process for the chemical modification of organic compounds to form {HEAD ~ immunogens} 
{ TAIL ~ One embodiment } of the invention is directed to a process for the chemical modification of organic compounds to form { HEAD ~ immunogens }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD