Limit the set to those related to pharmacokinetics
Steps
Start with a search in Substance
On the NCBI home page, choose PubChem Substance from the Database menu.
Type cyanocobalamin in the search box.
Click Go.
Restrict the name by complete synonyms
In the search box, add [completesynonym] to the end of the query (cyanocobalamin). Your query
should be cyanocobalamin[completesynonym].
Click Go, and note the number of records.
Open a record to view available links
Click on SID 551494.
Scroll down to the PubMed via Mesh section, and click on pharmacokinetics.
Compare to a search with MeSH
Click on the History tab.
Locate the search you just performed and its history number (query key) to the left. Clear the search box and enter
this number preceded by the # sign (example: #2).
To see how many of these abstracts you would retrieve by finding cyanocobalamin in the Title or Abstract
text, add this to your query: AND cyanocobalamin[tiab]. Click Preview.
What if you had searched with "vitamin b 12"? Try it: in your query replace cyanocobalamin with "vitamin B 12"[tiab] and click Preview.
