O=C1N[C@]2(CCOc3cc(F)c(Cl)cc32)C(=O)N1c1cncc2ccccc12
O=C1N[C@]2(COc3cc(F)c(Cl)cc32)C(=O)N1c1cncc2ccccc12
O=C1C[C@]2(CCOc3cc(F)c(Cl)cc32)C(=O)N1c1cncc2ccccc12
O=C1C[C@]2(COc3cc(F)c(Cl)cc32)C(=O)N1c1cncc2ccccc12
Improve affinity by adding fluorine based on SAR analysis.