1. (3R,5R)-叔丁基瑞舒伐他汀(瑞舒伐他汀杂质)

(3R,5R)-叔丁基瑞舒伐他汀(瑞舒伐他汀杂质)

(3R,5R)-tert-Butyl Rosuvastatin (Rosuvastatin Impurity)