<chemical> A selective nicotinic cholinergic agonist used as a research tool. Dmpp activates nicotinic receptors in autonomic ganglia but has little effect at the neuromuscular junction. ... Pharmacological action: ganglionic stimulants, nicotinic agonists. ... Chemical name: Piperazinium, 1,1-dimethyl-4-phenyl-, iodide ... (12 Dec 1998) ... ... Found on http://www.encyclo.co.uk/local/20973