('CID100518919', 6),3-O-Benzylmorphine
('CID100518919', 6),Benzylmorphine
('CID100518919', 6),O3-Benzylmorphine
('CID100518919', 6),Benzylmorphine hydrochloride
('CID100518919', 6),Benzylmorphine Hydrochloride
('CID100518919', 6),Benzylmorphine
('CID100635600', 3),myristyl benzylmorphine
('CID100635600', 3),benzylmorphine myristic acid ester
('CID100635600', 3),3-benzylmorphine 6-myristate
ldiff: defaultdict(<type 'list'>, {'CID100518919': [4, 0, 3, 14, 14, 0], 'CID100635600': [9, 20, 14]})
f1: [4, 0, 3, 14, 14, 0]
f2: [9, 20, 14]
c1: Counter({0: 2, 14: 2, 3: 1, 4: 1})
c2: Counter({9: 1, 20: 1, 14: 1})
The chosen was ... CID100518919