You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is pain treatment. Use the above information to create a molecule.
user
CCCCCCCCCCCCCCCC(=O)C(O)C(O)(C(=O)c1cccc(NC(=O)C(CS)Cc2ccccc2)c1)C(O)C(=O)CCCCCCCCCCCCCCC
assistant