US 9,829,796 B2  254  253  -continued  OH  ~o  0  i}OH  HO  Mw: 14500  Mw/Mn: 1.48  P-21  OH  P-22  Mw: 13000  Mw/Mn: 1.47  OH  1:  0  0  )(’o  6  0  1:  0  0  ~  0  N~N  ~NAN~N~  o)  lo  I  I  Mw: 13500  Mw/Mn: 1.48  P-23  -continued 