Pravastatin-D3:ßR,dR,1S,2S,6S,8S,8aR)-1,2,6,7,8,8a-Hexahydro-ß,d,6-trihydroxy-2-methyl-8-[(2S)-2-(methyl-d3)-1-oxobutoxy]-1-naphthaleneheptanoic Acid sodium salt.