US 9,869,931 B2  34  33  -continued  -continued  (A-2)-43  (A-2)-44  (A-2)-45  (A-2)-46  (A-2)-47  (A-2)-48  H3C’-.  ,..CH  CH  3  I  ~CH-0  (A-2)-49  CH 3  (A-2)-50  H3C’-.  CH$_{2 }$ -lH-oo  (A-2)-51  (A-2)-52  (A-2)-53  (A-2)-54  (A-2)-55  (A-2)-56  (A-2)-57  (A-2)-59  (A-2)-58  (A-2)-60 