(R,R,R)-Aprepitant (Aprepitant EP Impurity E) is the (R,R,R)-enantiomer of Aprepitant (A729800), the key intermediate of Aprepitant in bulk drug and formulation samples of Aprepitant.
(R,R,R)-Aprepitant (Aprepitant Related Compound A) is a USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia.
