You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: When heated to decomposition it emits toxic fumes of nitrogen oxides. The molecule is a anti allergic agent. The molecule is a h1-receptor antagonist and belongs to the cholinergic antagonist class of molecules with a Faint odor.
user