In another embodiment, {HEAD ~ the water soluble and non peptidic polymer} has {TAIL ~ the structure} HO POLYa Rq and the 1 benzotriazolylcarbonate ester of the water soluble and non peptidic polymer has the structure 
has
In another embodiment , { HEAD ~ the water soluble and non peptidic polymer } has { TAIL ~ the structure } HO POLYa Rq and the 1 benzotriazolylcarbonate ester of the water soluble and non peptidic polymer has the structure
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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