['C[C@H](N)[C@@H]1CCCO1', 'O=CN1CCc2sccc2C1', 'c1cc2c(s1)CCNC2', 'C[C@H](NC=O)[C@@H]1CCCO1', 'CC[C@@H]1CCCO1', 'NC(=O)N1CCc2sccc2C1', 'C1CCOC1', 'CCNC(=O)N1CCc2sccc2C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(NC[C@@H]1CCCO1)N1CCc2sccc2C1.