the crystal and molecular structures of methyl 2,6-dimethyl-5-nitro-4- ( 2-trifluoromethylphenyl ) -1,4- dihydropyridine-3-carboxylate and ethyl 4- ( 2-difluoromethoxyphenyl ) -1,4,5,7 , -tetrahydro-2-methyl-5-oxof uro [ 3,4-b ] pyridine-3-carboxylate , which are analogs of the calcium channel antagonist nifedipine reported to have agonist activity , have been determined .
C0012315
dihydropyridine
C0028066
nifedipine