('CID102755956', 1),Boc-4-Iodo-phenylalanine
('CID100134497', 1),IODO-PHENYLALANINE
ldiff: defaultdict(<type 'list'>, {'CID102755956': [6], 'CID100134497': [0]})
f1: [6]
f2: [0]
c1: Counter({6: 1})
c2: Counter({0: 1})
The chosen was  ... CID100134497