tert-Butylcyanoketene reacts with tertiary amines. The reaction of tert-butylcyanoketene with a series of isocyanides results in an unusual mode of addition involving the carbonyl bond of the ketene. tert-Butylcyanoketene cycloadds to ketene, methylketene, dimethylketene, and ethylmethylketene.

Rutarin is a coumarin glycoside. Rutarin is found in herbs and spices. Rutarin has antibiotic activity. Rutarin inhibited Plasmodium falciparum with IC50 value of 88 ug/mL.

Scutellarin is the main bioactive component of Breviscapine prepared from the traditional Chinese herb Erilgeron breviscapus (Vant) Hand-Mazz. Scutellarin demonstrated protective effect on cardiovascular and cerebrovascular ischemia. The potential cytoprotective effects of the drug against cerebrovascular ischemia were evidenced by reducing cerebral infarct sizes, ameliorating neurological deficit and inhibiting neuronal apoptosis. Scutellarin is capable of inhibiting I(Na) in neurons through predominantly affecting the inactivated state of I(Na). Scutellarin may alleviate cognitive impairment in a mouse model of hypoxia by promoting proliferation and neuronal differentiation of neural stem cells. Scutellarin might play an therapeutic role by inhibiting oxidative stress and apoptosis in Alzheimer's disease treatment.

(R)-Ropivacaine (Dextroropivacaine) is a voltage-dependent potassium channel blocker with local anesthetic activity. (S)-Ropivacaine is a medication used for the production of local or regional anesthesia for surgery and for acute pain management. Ropivacaine shows a difference in channel blockade between two enantiomers, and R-Ropivacaine shows greater cardiotoxicity than (S)-Ropivacaine. (R)-Ropivacaine is the impurity in commercial formulations of Ropivacaine.