You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is both a nutrient and a waste product.
user
CCC(C)C1NC(=O)C2CCCN2C(=O)C(CC(C)(C)O)OC(=O)CCNC(=O)C(C)N(C)C(=O)C(C(C)CC)N(C)C1=O
assistant