('CID106429405', 3),4-methylnonanoic acid methyl ester
('CID106429405', 3),4-Methylnonanoic acid, methyl ester
('CID106429405', 3),4-METHYLNONANOIC ACID METHYL ESTER
('CID123649081', 3),(5R)-3-cyano-5-methylnonanoic acid ethyl ester
('CID123649081', 3),(3S,5R)-3-cyano-5-methylnonanoic acid ethyl ester
('CID123649081', 3),(3R,5R)-3-cyano-5-methylnonanoic acid ethyl ester
ldiff: defaultdict(<type 'list'>, {'CID123649081': [24, 27, 27], 'CID106429405': [12, 13, 12]})
f1: [12, 13, 12]
f2: [24, 27, 27]
c1: Counter({12: 2, 13: 1})
c2: Counter({27: 2, 24: 1})
The chosen was ... CID106429405