O=C(Nc1nnc(C2CC2)s1)[C@@H]1CCOc2ccc(Cl)cc21
Lots of ifs.... I can;t visualise or model structure of this.... Can the cprop be moved along the ring? Can a S be introduced to make use of the sulphur effect? Might lead to some conformational restriction?
See: A Survey of the Role of Noncovalent Sulfur Interactions in Drug Design. DOI: 10.1021/jm501853m