('CID100061583', 2),1-Methyl-4-phenyl-4-propionoxypiperidine
('CID100061583', 2),1-Methyl-4-phenyl-4-propionoxypiperidine hydrochloride
('CID100151801', 1),1-Methyl-4-phenyl-4-propionoxypiperidine N-oxide hydrochloride
ldiff: defaultdict(<type 'list'>, {'CID100151801': [22], 'CID100061583': [0, 14]})
f1: [0, 14]
f2: [22]
c1: Counter({0: 1, 14: 1})
c2: Counter({22: 1})
The chosen was ... CID100061583