('CID100019395', 5),Ethyl thiopyrophosphate
('CID100019395', 5),Ethyl thiopyrophosphate ((EtO)2(PS)2O)
('CID100019395', 5),Ethyl thiopyrophosphate ([(EtO)2PS]2O)
('CID100019395', 5),Tetraethyl thiopyrophosphate
('CID100019395', 5),Tetraethyl thiopyrophosphate (8CI)
('CID100018609', 5),Tetrapropyl thiopyrophosphate
('CID100018609', 5),Propyl thiopyrophosphate
('CID100018609', 5),Propyl thiopyrophosphate (((PrO)2P(S))2O)
('CID100018609', 5),Propyl thiopyrophosphate ([(PrO)2P(S)]2O)
('CID100018609', 5),Tetrapropyl thiopyrophosphate (8CI)
ldiff: defaultdict(<type 'list'>, {'CID100019395': [6, 21, 21, 11, 17], 'CID100018609': [12, 7, 24, 24, 18]})
f1: [6, 21, 21, 11, 17]
f2: [12, 7, 24, 24, 18]
c1: Counter({21: 2, 17: 1, 11: 1, 6: 1})
c2: Counter({24: 2, 18: 1, 12: 1, 7: 1})
The chosen was ... CID100019395