Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/6YJ3
Carbonic anhydrase 2Metala-Carborane di-propyl-sulfonamideZINC ION
carboranedipropylsulfonamide
https://www.ncbi.nlm.nih.gov/Structure/pdb/6YO7
Carbonic anhydrase 2Ortho-Carborane di-propyl-sulfonamideZINC ION
orthocarboranedipropylsulfonamide