has role is protonated form of has functional parent pyrroles xenobiotic dihydroxy monocarboxylic acid atorvastatin A dihydroxy monocarboxylic acid that is a member of the drug class known as statins, used primarily for lowering blood cholesterol and for preventing cardiovascular diseases. heptanoic acid atorvastatin(1-) aromatic amide environmental contaminant monofluorobenzenes statin (synthetic)