('CID100116921', 2),N-(triethoxysilylpropyl)dansylamide
('CID100116921', 2),N-(Triethoxysilylpropyl)dansylamide
('CID116218738', 1),N-[3-(1,4,7-Trithia-10-aza-10-cyclododecyl)propyl]dansylamide
ldiff: defaultdict(<type 'list'>, {'CID116218738': [50], 'CID100116921': [24, 24]})
f1: [24, 24]
f2: [50]
c1: Counter({24: 2})
c2: Counter({50: 1})
The chosen was ... CID100116921