['NC=O', 'N[C@@H](CC(=O)N[C@H]1CCCc2ccccc21)c1cccs1', 'N[C@H]1CCCc2ccccc21', 'NC(=O)N[C@@H](CC=O)c1cccs1', 'NC(N)=O', 'O=C(CCc1cccs1)N[C@H]1CCCc2ccccc21', 'c1ccsc1', 'NC(=O)NCCC(=O)N[C@H]1CCCc2ccccc21']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CCc1cccs1)N[C@H]1CCCc2ccccc21.