('CID100193547', 3),N-acetylproline N-methylamide
('CID100193547', 3),N-Acetylproline N-methylamide
('CID100193547', 3),N-Acetylproline N-methylamide
('CID100066141', 3),N-Acetylproline
('CID100066141', 3),N-ACETYLPROLINE
('CID100066141', 3),(R)-(+)-N-Acetylproline
ldiff: defaultdict(<type 'list'>, {'CID100193547': [14, 14, 14], 'CID100066141': [0, 0, 8]})
f1: [14, 14, 14]
f2: [0, 0, 8]
c1: Counter({14: 3})
c2: Counter({0: 2, 8: 1})
The chosen was  ... CID100066141