['CCCCO', 'NC[C@@H](O)Cn1c2ccc(Br)cc2c2cc(Br)ccc21', 'CC[C@H](N)CO', 'C[C@@H](O)Cn1c2ccc(Br)cc2c2cc(Br)ccc21', 'CC[C@@H](CO)NC[C@H](C)O', 'Brc1ccc2[nH]c3ccc(Br)cc3c2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)[nH]c1ccccc12.