US 10,620,533 B2  109  110  -continued  -continued  Quencher  9  Quencher 12  Quencher 10  Quencher 13  Quencher  11  Synthesis Example  yb  ito  o  0 )  o  ~  ~:  0~  er  OH  0  0  Polymer 1  Mw  ~  8,500  Mw/Mn~l.78  Synthesis of Polymers 1 to 6  Base polymers were prepared by combining suitable  monomers, effecting copolymerization reaction thereof in  tetrahydrofuran solvent, pouring the reaction solution into  methanol for crystallization, repeatedly washing with  hexane, isolation, and drying. The resulting polymers, des› ignated Polymers 1 to 6, were analyzed for composition by  $^{1}$H-NMR, and for Mw and Mw/Mn by GPC. 