You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule is a gastric acid inhibitor and belongs to the anti allergy class of molecules, with the characteristic of being anti histamine.
user
Fc1ccc(C(c2ccc(F)cc2)C2CCN(CCCOc3ccc4ccccc4c3)CC2)cc1.O
assistant