22  US 7,217,493 B2  21  -continued  -continued  B-59  B-60  B-61  B-62  B-63  B-64  0  Q-o-so,-c,c,  0  B-65  B-66  0  ~N-o-so,-c,c,  0  B-67  B-68  B-58  --q- N2  II  - so,-c-so,--p-- O  r4H9  s,  n-C$_{4}$H$_{9 }$ H3  B-50  B-54  B-53  0  0  B-52  II  - N2  S02-C-S0 2 -D  B-55  B-56  B-57 