Nicardipine
"The potent LTC antagonists R(+)BayK 8644 (Research Biochemicals International, USA) and nicardipine (Sigma) were prepared as a 10 mM stock solution in absolute ethanol and 100 mM stock solution in dimethyl sulfoxide, respectively."
-http://www.xenbase.org/literature/article.do?method=display&articleId=10337 LTC = L-type Calcium channel
http://www.sigmaaldrich.com/catalog/product/sigma/n7510?lang=en®ion=US