The structure shown is Crestor
® (rosuvastatin), a medication used to reduce cholesterol. Assign the absolute configurations of the two chiral carbons as
R or
S.

◦ There are two chiral carbons: one is
S, the other is
R◦ There are two chiral carbons: both centers are
R◦ There are more than two chiral carbons in Crestor
◦ There are two chiral carbons: both centers are
S