US 2020/0192222 Al  118  Jun.  18,2020  -continued  ~t,,  q  (h  O  01  O~OH  ~  OH  OH  O  OH  OH  (g3)  R46  I  +s-R47  I  R4s  (g2)  R43  I  +s-R44  I  R45  (gl)  [0101]  In another preferred embodiment, Polymer A may  further comprise recurring units ( e) selected from units of  indene,  benzofuran,  benzothiophene,  acenaphthylene,  chromone, coumarin, and norbornadiene, or derivatives  thereof. The recurring units ( e) may be used alone or in  admixture.  [0102]  Suitable monomers from which recurring units (e)  are derived are exemplified below, but not limited thereto.  [0106]  In formulae (gl) to (g3),  RA  is each independently  hydrogen or methyl. Z 1  is a single bond, phenylene group,  ---O-Z 12 -,  or  -C(=0)-Z$^{11}$-Z 12 -,  wherein Z 11  is  ---0- or  -NH-,  and Z$^{12 }$is a C$_{1}$-C$_{6 }$ alkanediyl, C$_{2}$ -C$_{6 }$ alkenediyl or phenylene group, which may contain a carbo› nyl, ester bond, ether bond or hydroxyl moiety. Z $^{2 }$is a single  bond,  -Z$^{21}$----C(=0)-0-, -Z $^{21}$---0- or -Z$^{21}$-0- C(=0)-, wherein Z $^{21 }$is a C$_{1 }$-C$_{12 }$alkanediyl group which  may contain a carbonyl moiety, ester bond or ether bond. Z 3  is a single bond, methylene, ethylene, phenylene or fluori- [0103]  Polymer A may further comprise recurring units (f)  which are derived from styrene, vinylnaphthalene, vinylan› thracene, vinylpyrene, methyleneindene, vinylpyridine, and  vinylcarbazole. The recurring units (f) may be used alone or  in admixture.  [0104]  In a further embodiment, Polymer A may further  comprise recurring units (g) derived from a sulfonic acid  onium salt having a polymerizable unsaturated bond. JP-A  2005-084365 discloses sulfonium and iodonium salts having  a polymerizable unsaturated bond capable of generating a  sulfonic acid. JP-A 2006-178317 discloses a sulfonium salt  having sulfonic acid directly attached to the main chain.  [0105]  The preferred recurring units (g) are recurring units  having the following formulae (gl), (g2) and (g3). These  units are simply referred to as recurring units (gl), (g2) and  (g3), which may be used alone or in combination of two or  more types.  -continued  CD  CDyo,  0 