['CCOCC(C)N', 'O=Cc1cc(Br)c[nH]1', 'CC', 'CC(CO)NC(=O)c1cc(Br)c[nH]1', 'CCO', 'CC(C)NC(=O)c1cc(Br)c[nH]1', 'CCCOCC', 'NC(=O)c1cc(Br)c[nH]1', 'Brc1cc[nH]c1', 'CCOCC(C)NC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cc[nH]c1.