('CID100133805', 3),t-Butoxycarbonyl-beta-phenacyl-aspartyl-phenylalanineamide
('CID100133805', 3),tert-Butoxycarbonyl-beta-phenacyl-aspartyl-phenylalanineamide
('CID100133805', 3),Boc-beta-phenacyl-aspartyl-phenylalanineamide
('CID100259590', 2),GLYCYL-L-PHENYLALANINEAMIDE
('CID100259590', 2),GLYCYL-L-PHENYLALANINEAMIDE
ldiff: defaultdict(<type 'list'>, {'CID100133805': [40, 43, 27], 'CID100259590': [9, 9]})
f1: [40, 43, 27]
f2: [9, 9]
c1: Counter({40: 1, 27: 1, 43: 1})
c2: Counter({9: 2})
The chosen was  ... CID100259590