COC1(C(=O)Nc2cncc3ccc(S(C)(=O)=O)cc23)CN(S(C)(=O)=O)Cc2ccc(Cl)cc21
COC1(C(=O)Nc2cncc3ccc(S(C)(=O)=O)cc23)CN(S(C)(=O)=O)Cc2cc(F)c(Cl)cc21
CC1(C(=O)Nc2cncc3ccc(S(C)(=O)=O)cc23)CN(S(C)(=O)=O)Cc2cc(F)c(Cl)cc21
CC1(C(=O)Nc2cncc3ccc(F)cc23)CN(S(C)(=O)=O)Cc2cc(F)c(Cl)cc21
COC1(C(=O)Nc2cncc3ccc(F)cc23)CN(S(C)(=O)=O)Cc2ccc(Cl)cc21
Potential additive potency from halo and methoxy/methyl and tetrahydroisoquinoline sulfonamide. Di halo substitution appears to antagonise with dihalo substitution.