You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: It impacts pain, chest pain, and breathing difficulties. The molecule is a pheromone and a animal metabolite, impacting both cardiac arrest and seizure. The molecule is a nutrient and air pollutant, and it impacts apnea. It impacts confusion, coma, vertigo, and vomiting. Please write the SMILES representation of it.
user