('CID105288838', 2),N-METHYL-PYRIDOXAL-5'-PHOSPHATE
('CID105288838', 2),N-Methyl-Pyridoxal-5'-Phosphate
('CID104368956', 1),N-Methyl-Pyridoxal-5'-Phosphate
ldiff: defaultdict(<type 'list'>, {'CID104368956': [1], 'CID105288838': [1, 1]})
f1: [1, 1]
f2: [1]
c1: Counter({1: 2})
c2: Counter({1: 1})
The chosen was ... CID105288838