Patent ID: 7705036

Claim:
A compound of formula (I): wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 are each independently hydrogen or deuterium; and R 9 and R 10 are each independently hydroxy, methoxy or —OCD 3 ; where at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 is deuterium or at least one of R 9 and R 10 is —OCD 3 ; or an isolated stereoisomer thereof; or a pharmaceutically acceptable salt thereof; wherein the deuterium present in the compound is present at greater than the natural abundance of deuterium.