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Binding values of natural ionophores compared to a 18-crown-6-derivative in chloroform.
| Host | log Kass (guest perchlorate salt) | ||
| Potassium | Ammonium | n-butylammonium | |
| cis-dicyclohexano-18-crown-6a | 8.23 | 7.69 | 6.16 |
| valinomycin (222) | 8.99 | 7.15 | 4.20 |
| nonactin (221) | 7.18 | 7.66 | 5.19 |
a= Reference [701].
