Unsaturated fatty acid amides, 9 (Z)-octadecenamide (2) and 9 (Z), 12 (Z)- octadecadienamide (4) as inhibitors of acyl-CoA: cholesterol acyltransferase (ACAT) were isolated from the ethyl acetate extracts of the insect, Mylabris phalerate Pallas, and elucidated by their spectroscopic data analysis. Compounds 2 and 4 inhibited rat liver microsomal ACAT, hACAT-1, and hACAT-2 with IC50 values of 170, 85, and 63μM for 2 ...