<prompt> All are dihydropyradines exceptNifedipineNimodipineVerapamilFelodipine  <response>: Refer kDT 6e p530 Dihydropyridine DHP is a molecule based upon pyridine, and the parent of a class of molecules that have been semi-saturated with two substituents replacing one double bond. They are paicularly well known in pharmacology as L-type calcium channel blockers, used in the treatment of hypeension. Verapamil is a calcium channel blockers 