US 2019/0287691 Al  30  Sep. 19,2019  wherein  R$_{2}$ ,  R$_{14}$, R 16 , R 18 , and R 19 , individually, include H, OH, or  an alkyl group having from 1 to 10 carbon atoms;  R$_{17 }$ includes NH$_{2}$ ,  C(=O)OH, maleimide, dibromo-ma› leimide, isothiocyanate, alkyne, or azide; and  r is from Oto 4.  wherein:  R$_{2}$, R$_{14}$ , R 16 , R 18 , and R 19 , individually, include H, OH, or  an alkyl group having from 1 to 10 carbon atoms;  R$_{17 }$ includes NH$_{2}$ ,  C(=O)OH, maleimide, dibromo-ma› leimide, isothiocyanate, alkyne, or azide; and  r is from 0 to 4.  wherein:  R$_{2}$ ,  R$_{14}$, R 16 , R 18 , R 19 , and R 20 , individually, include H, OH,  or an alkyl group having from 1 to 10 carbon atoms;  R$_{17 }$ includes NH$_{2}$ ,  C(=O)OH, maleimide, dibromo-ma› leimide, isothiocyanate, alkyne, or azide; and  r can be from 0 to 4.  wherein:  R$_{2}$ ,  R$_{14}$, R 16 , R 18 , and R 19 , individually, include H, OH, or  an alkyl group having from 1 to 10 carbon atoms;  R$_{17 }$ includes NH$_{2}$ ,  C(=O)OH, maleimide, dibromo-ma› leimide, isothiocyanate, alkyne, or azide;  r is from 0 to 4.  wherein:  R$_{21 }$ and R$_{22}$, individually, include H, OH, or an alkyl group  having from 1 to 10 carbon atoms;  R$_{23 }$ includes H, OH, an alkyl group having from 1 to 10  carbon atoms, or (CH$_{2}$)eRa, where  Ra  is NH$_{2}$, C(=O)OH,  maleimide, dibromo-maleimide, isothiocyanate, alkyne, or  azide;  wherein:  R$_{2}$ ,  R$_{14}$, R 16 , R 18 , R 19 , and R 20 , individually, include H, OH,  or an alkyl group having from 1 to 10 carbon atoms;  R$_{17 }$ includes NH$_{2}$ ,  C(=O)OH, maleimide, dibromo-ma› leimide, isothiocyanate, alkyne, or azide; and  r can be from 0 to 4.  ~  HO:N ---{O  R14...._N~  ~2  (  0  N~N~N~N)lN  /  /  ’  L  R16  R19  OH,  0  OH  R1s  7  ,  N~f  ~  N---i<  ~  J,,R  /  II  11  HO  O  O  OH  R14, )LN/  J  ’R20  R2  (  0  h~N~N~N)lN  /  /’  L  R16  R19  OH,  HO  OH  R1s  7  ,  N~f  ~  N---i<  ~  J,,R  /  II  11  HO  O  ~  HO,---{O  R14...._N~  ~2  (  0  N~N~N~N)lN  /  /  ’  L  R16  R19  OH,  HO  OH  R1s  7  ,  N~f  ~  N---i<  ~  J,,R  /  II  11  HO  O  O  OH  R14, )LN/  J  ’R20  ~  (  0  h~N~N~N)lN  /  /’  L  R16  R19  OH,  0  OH  R1s  7  ,  N~f  ~  N---i<  ~  J,,R  /  II  11  HO  O  ~  ~  ~  ~  ~  /R23,  R21  N  a  I N ~NL  c  N ’- I  I  I  d  R24  OH  R$_{22 }$ OH  [0332]  31. A composition, including a structure:  [0329]  28. A composition of embodiment 23, including  a structure:  [0331]  30. A composition of embodiment 23, including  a structure:  [0330]  29. A composition of embodiment 23, including  a structure:  [0328]  27. A composition of embodiment 23, including  a structure: 