['CC(=O)O', 'Cc1cnc(CCc2ccccc2)nc1', 'CCc1ccccc1', 'O=C(O)/C=C/c1cncnc1', 'c1ccccc1', 'CCc1ncc(/C=C/C(=O)O)cn1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(CCc2ncccn2)cc1.