OH  s<–l  H~  C~  \  I  C  C  He/\  I  ’--cH  3  CH3  H3C  3  42  US 8,852,845 B2  41  -continued  -continued  OH  CH3  I  $^{*----fCH2-}$1 -r-*  c=o  I  e  O~SO3  CH3  I  $^{*----fCH2-}$1 -r-*  c=o  t.,,,/•~SO~  I  CH3  I  *----fCH2- 1 -r-*  c=o  I  e  O~SO3  CH3  I  *----fCH2-C-r-*  I  c=o  6~so~ I  H  N ~OH 