This transformation can be accomplished using standard methods to effect {HEAD ~ carboxylic acid} to {TAIL ~ carboxylic acid} amide transformations 
to
This transformation can be accomplished using standard methods to effect { HEAD ~ carboxylic acid } to { TAIL ~ carboxylic acid } amide transformations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH