You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a pde inhibitor and a cardiovascular disease treatment, belonging to the asthma treatment class of molecules.
user
CCn1c(=S)[nH]c2cc3c(NCCCCCN4CCSCC4)ncnc3cc21
assistant