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: It belongs to the alzheimer's treatment class of molecules. Please represent the molecule in SMILES.
user
O=C(NC(c1cccnc1)C(F)(F)F)c1cc(-c2cnn3cc(-c4ccc(OCCN5CCCCC5)cc4)cnc23)cs1
assistant