('CID100118726', 4),2-[(2-Aminoethyl)amino]ethanesulfonicacid
('CID100118726', 4),2-[(2-AMINOETHYL)-AMINO]-ETHANESULFONICACID
('CID100118726', 4),2-[(2-Aminoethyl)amino]ethanesulfonicacid sodium salt
('CID100118726', 4),Ethanesulfonicacid, 2-[(2-aminoethyl)amino]-, monosodium salt (9CI)
('CID100209449', 2),Ethanesulfonicacid, 2-[(2,3-dimercaptopropyl)thio]-, monosodium salt (8CI,9CI)
('CID100209449', 2), Ethanesulfonicacid, 2-[(2,3-dimercaptopropyl)thio]-, sodium salt (6CI,7CI)
ldiff: defaultdict(<type 'list'>, {'CID100118726': [23, 25, 35, 49], 'CID100209449': [60, 57]})
f1: [23, 25, 35, 49]
f2: [60, 57]
c1: Counter({25: 1, 35: 1, 49: 1, 23: 1})
c2: Counter({57: 1, 60: 1})
The chosen was ... CID100118726