('CID100005133', 2),s-(p-nitrobenzyl)glutathione
('CID100005133', 2),S-(P-NITROBENZYL)GLUTATHIONE
('CID121197269', 1),s-(p-nitrobenzyl)glutathione
ldiff: defaultdict(<type 'list'>, {'CID121197269': [0], 'CID100005133': [0, 0]})
f1: [0, 0]
f2: [0]
c1: Counter({0: 2})
c2: Counter({0: 1})
The chosen was ... CID100005133