US 9,423,690 B2  131  132  -continued  -continued  P-40  •1:•  *  *  6j  0  0  #  OH  P-37  •1:• •1:•  0  0  0  0  ¢  ao  OH  •1:•  0  0  P-41  •1:•  *  0  0  OH  P-42  •1:•  0  0  OH  0  P-43  OH  P-44  OH  P-39  P-38  OH 