Inhibitors of Acyl-CoA:Cholesterol <i>O</i>-Acyltransferase. 2. Identification and Structure−Activity Relationships of a Novel Series of <i>N</i>-Alkyl-<i>N</i>-(heteroaryl-substituted benzyl)-<i>N‘</i>-arylureas
tuted benzyl)-N'-arylurea and related derivatives represented by 2 and 3 have been prepared and evaluated for their ability to inhibitacyl-CoA:cholesterol O-acyltransferase in vitro and to lower plasma cholesterol levels in cholesterol-fed rats in vivo. Among these novel compounds, the type 3 series was superior. A pyrazol-3-yl group on the N-benzyl group of this trisubstituted urea (i.e. 3, Ar1 =