Figure 12.

Finding records annotated with classification and ontological terms, using the PubChem Classification Browser (https://pubchem.ncbi.nlm.nih.gov/classification/). The classification browser can also be accessed by clicking the “Browse Data” button (1), available on the PubChem homepage. To find compounds annotated with the Medical Subject Headings (MeSH) terms “Antihypertensive Agents”, select “MeSH” for classification (2), “Compound” for data type counts to display (3), and type “Antihypertensive Agent” in the search box (4). Clicking the compound record count (5) for the MeSH term will show the relevant records (see Fig. 13). Note that MeSH terms are organized in a hierarchical (tree) structure (as indicated in the blue box). The view type menu (indicated in the purple box) allows the user to select to view the returned MeSH terms in a list or tree view.