Thienopyrimidines are a class of heterocyclic compounds with diverse biological activities depending on their detailed substitution patterns. In addition, many thienopyrimidine derivatives have shown potent activity against cancer cell lines and specific oncogenes.
Pyrrolidine, also known as tetrahydropyrrole, is a saturated five-membered heterocyclic ring, which is miscible with water. Pyrrolidine exists in many alkaloids and drug molecules, such as kappa opioids, antagonists of dopamine D4 receptors, and HIV reverse transcriptase inhibitors.