('CID100071113', 4),Valpromide (INN)
('CID100071113', 4),Valpromide [INN]
('CID100071113', 4),VALPROMIDE
('CID100071113', 4),Valpromide
('CID103081354', 2),N-Methoxy valpromide
('CID103081354', 2),N-methoxy Valpromide
ldiff: defaultdict(<type 'list'>, {'CID100071113': [6, 6, 0, 0], 'CID103081354': [10, 10]})
f1: [6, 6, 0, 0]
f2: [10, 10]
c1: Counter({0: 2, 6: 2})
c2: Counter({10: 2})
The chosen was ... CID100071113