('CID100023723', 3),meso-Erythritol tetranitrate
('CID100023723', 3),meso-Erythritol tetranitrate
('CID100023723', 3),Meso-erythritol tetranitrate
('CID100008998', 2),meso-Erythritol
('CID100008998', 2),meso-Erythritol
ldiff: defaultdict(<type 'list'>, {'CID100023723': [13, 13, 13], 'CID100008998': [0, 0]})
f1: [13, 13, 13]
f2: [0, 0]
c1: Counter({13: 3})
c2: Counter({0: 2})
The chosen was  ... CID100008998