US 9,034,557 B2  27  28  -continued  -continued  B-17  r  r  +  OH  B-23  OX’  OX’  I~  +  #  OH  B-18  r  r  +  OH  B-19  r  r  +  OH  B-20  r  r  +  OH  B-21  r  r  +  OH  B-22  r  r  +  OH  B-26  r  OH  B-25  r  OH  B-24  01:’  01:’  I~  +  #  OH  B-27  01:’  r  OH 