229  US 9,285,679 B2  230  -continued  -continued  (R-10)  OH  oyo~ 0  (R-11)  ,  -~~+  OH  (R-12)  •9• 9• 9•  oy  OH  $^{o}$1 o~  0  ¢  Q  0  OH  0~01  OJ____  *  -~:!)  OH  (R-13)  •o•  *  OH  -~:+Q  (R-14)  OH  OYO’  tBu  0  (R-15)  (R-16) 