English: Atorvastatin synthesis in commercial production (process) chemistry. The key step establishing a stereocenter in this apparent commercial route to atorvastatin makes use of a readily available natural product, isoascornic acid, thus following a chiral pool approach to set the stereochemistry of the first alcohol functional group. Associated REF «Chapter 9. Atorvastatin Calcium (Lipitor)» in (۲۰۰۴) Contemporary Drug Synthesis، John Wiley & Sons, Inc.، صص. 113–125 ISBN: 0-471-21480-9. . Created by dividing/cropping original image File:Atorvastatin_routes.png of User:Jammercer. NOTE: Integrity of information contained in the image is judged reasonable by this expert, but this citation was not actually contained in the source file, and image details were not checked against this inferred source. Use source and image only with verification of content for each intended purpose. Le Prof