FIGURE 1. The molecular structures of nemadipine-A, nemadipine-B, felodipine, and the core 1,4-dihydropyridine (DHP) structure.
From the following article:
A small-molecule screen in C. elegans yields a new calcium channel antagonist
Trevor C. Y. Kwok, Nicole Ricker, Regina Fraser, Allen W. Chan, Andrew Burns, Elise F. Stanley, Peter McCourt, Sean R. Cutler & Peter J. Roy
Nature 441, 91-95(4 May 2006)
doi:10.1038/nature04657
R1, R2 and X are defined in Table 1.
