has part is deprotonated form of (S)-mevalonate mevalonate (RS)-mevalonate A racemate composed of equimolar amounts of (<i>R</i>)- and (<i>S</i>)-mevalonate. (+-)-mevalonate mevalonic acid anion RS-mevalonate racemic mevalonate rac-mevalonate rac-3,5-dihydroxy-3-methylpentanoate rac-3,5-dihydroxy-3-methylpentanoate mevalonic acid (R)-mevalonate racemate