SSI-4 is an orally active stearoyl-CoA desaturase (SCD1) inhibitor with an EC50 of 1.9 nM against mouse SCD1. SSI-4 blocks the conversion of saturated fatty acids to monounsaturated fatty acids, reducing the production of oleic acid and palmitoleic acid. SSI-4 induces lipid peroxidation, endoplasmic reticulum stress, DNA damage and activates apoptotic mechanisms. SSI-4 inhibits mTORC1 activity, suppresses B cell proliferation and antibody production, and induces autophagy. SSI-4 is applicable to research on cancers such as acute myeloid leukemia and renal cell carcinoma, as well as influenza infections[1][2][3][4].