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Table 4 Effect of individual stop-word lists on F-score.

From: Recognition of chemical entities: combining dictionary-based and grammar-based approaches

  Baseline Basic English PubMed stop words Jochem stop words CHEMDNER guidelines
Resource P R F P R F P R F P R F P R F
ChEBI 28.3 40.6 33.4 69.0 40.3 50.9 63.0 40.3 49.2 28.5 40.1 33.3 29.3 40.6 34.0
ChEMBL 87.9 18.7 30.8 87.9 18.7 30.8 87.9 18.7 30.8 88.8 18.7 30.9 87.9 18.7 30.8
ChemSpider 65.4 39.0 48.9 74.4 38.8 51.0 65.3 38.8 48.7 69.3 38.6 49.6 67.9 39.0 49.5
DrugBank 63.0 17.2 27.0 63.0 17.2 27.0 63.0 17.2 27.0 78.1 17.1 28.1 63.1 17.2 27.0
HMDB 53.2 34.5 41.8 74.6 34.4 47.1 72.6 34.4 46.7 55.7 34.0 42.2 55.2 34.5 42.5
NPC 46.8 26.7 34.0 47.6 26.5 34.0 46.6 26.5 33.7 52.2 26.7 35.3 53.3 26.7 35.6
TTD 43.9 14.7 22.1 64.9 14.5 23.7 66.0 14.5 23.8 50.6 14.7 22.8 43.9 14.7 22.1
PubChem 17.4 59.0 26.9 44.5 58.7 50.6 42.4 58.6 49.2 18.9 58.3 28.5 17.9 59.0 27.4
Jochem 64.2 52.5 57.8 65.2 52.5 58.2 64.2 52.5 57.8 64.1 52.5 57.7 67.1 52.5 58.9
UMLS 37.7 51.1 43.4 45.4 50.8 43.6 38.0 51.1 43.6 40.0 50.8 44.9 42.4 51.1 46.4
ChEBI 10.4 16.6 12.8 21.0 16.6 18.5 21.0 16.6 18.5 10.8 16.4 13.1 11.6 16.6 13.7
Family Oscar 25.1 63.2 35.9 25.4 63.0 36.2 25.3 62.9 36.1 25.7 62.7 36.4 27.7 63.2 38.5
LeadMine 64.9 47.4 54.8 66.4 47.4 55.3 64.9 47.4 54.8 68.0 47.1 55.7 72.8 47.4 57.4
ChemAxon 80.9 41.8 55.1 80.9 41.8 55.1 80.9 41.8 55.1 81.1 41.7 55.1 83.3 41.8 55.5