Keywords: Diproteverine.svg Skeletal formula of diproteverine Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 8 0 and http //www inkscape org Inkscape Own 2007-05-12 Fvasconcellos 20 10 12 May 2007 UTC Calcium channel blockers Isoquinolines Phenol ethers |