CC(=O)N1CCC2C(C1)CN(c1cncc3ccccc13)C(=O)C2c1cccc(Cl)c1
CC(=O)N1CCC2C(CC(c3cncc4ccccc34)C(=O)N2c2cccc(Cl)c2)C1
CC(=O)N1CCC2C(C1)CN(c1cncc3ccccc13)C(=O)N2c1cccc(Cl)c1
It's three-way merger of BEN-DND-93268d01-8, ADA-UCB-6c2cb422-1, and PET-UNK-c9c1e0d8-3. Not sure if N-acetylpiperidine would be at right angle
It should be possible to make all of these using N-acetylpiperidone and Mannich reaction, Wittig reaction and reductive amination