Ipratropium is an anticholinergic drug (trade name: Atrovent®) administered by inhalation for the treatment of obstructive lung diseases. It acts by blocking muscarinic receptors in the lung, inhibiting bronchoconstriction and mucus secretion.

GoldBamboo

Ipratropium 3-(3-hydroxy-1-oxo-2-phenylpropoxy)- 8-methyl-8-(1-methyl ...
Wikipedia - [full article]