You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a histamine receptor antagonist and belongs to the tachykinin receptor antagonist class of molecules.
user
CCCC(=O)Oc1c(OC)cc(C(=O)N2CCC(CCS(C)(=O)=O)(c3ccccc3)C2)cc1OC
assistant