You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a anti asthmatic and anti spasmodic, belonging to both the myorelaxant and hormone antagonist classes of molecules. The molecule is a nutrient and belongs to the tracheorelaxant class of molecules; it is anti constrictive and anti arrhythmic. Please represent the molecule in SMILES.
user