[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is under investigation in Allogeneic Haematopoietic Stem Cell Transplantation. Treosulfan has been investigated for the treatment of Lymphoblastic Leukemia, Acute, Childhood."}, {"from": "gpt", "value": "[C][S][=Branch1][C][=O][=Branch1][C][=O][O][C][C@@H1][Branch1][#C][C@H1][Branch1][O][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C][O][O]"}]