A method of inhibiting cholesterol biosynthesis, or inhibiting and/or treating hyperlipemia, hyperlipidemia, hyperlipoproteinemia, hypercholesterolemia, and/or hypertriglyceridemia, or inhibiting and/or treating atherosclerosis, which comprises administering to a patient in need of such treatment a therapeutically effective amount of a compound having the structure ##STR82## wherein R.sup.2 is OR.sup.5 or R.sup.5a ;
- R.sup.3 and R.sup.5 are independently H, alkyl, arylalkyl, aryl, cycloalkyl, metal ion or other pharmaceutically acceptable salt, or prodrug ester;
- R.sup.5a is H, alkyl, arylalkyl or aryl;
- R.sup.4 is H, alkyl, aryl, cycloalkyl, arylalkyl, metal ion, or other pharmaceutically acceptable salt, or prodrug ester;
- R.sup.1 is a lipophilic group containing at least 7 carbons;
- Z is H, halogen, lower alkyl or lower alkenyl.