Lentztrehalose A, a disaccharide microbial metabolite identified in Lentzea, exhibits a range of biological activities. This compound specifically inhibits M. smegmatis trehalase-an enzyme involved in trehalose metabolism-more effectively than trehalase from porcine kidney, with IC50 values of 0.67 mM and >20 mM, respectively. Additionally, Lentztrehalose A at a concentration of 100 mM promotes autophagy in MeWo melanoma and OVK18 ovarian cancer cells. When administered at 50 mg/kg daily, it enhances survival rates and impedes tumor growth in a Sarcoma 180 murine sarcoma model.