(3R,5R)-7-[(1S,2S,6R,8S,8aR)-2,6-Dimethyl-8-[[(2S)-2-methylbutanoyl]oxy]-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoic Acid Sodium Salt (Lovastatin Hydroxy Acid Sodium Salt)