(6R,8aS)‐6‐morpholino‐1,5,6,8a‐tetrahydro‐3H‐oxazolo[3,4‐a]pyridin‐3‐one

(6R,8aS)‐6‐(azepan‐1‐yl)‐1,5,6,8a‐tetrahydro‐3H‐oxazolo[3,4‐a]pyridin‐3‐one

(6R,8aS)‐6‐(isoindolin‐2‐yl)‐5,6‐dihydro‐1H‐oxazolo[3,4‐a]pyridin‐3(8aH)‐one

2‐((6R,8aS)‐3‐oxo‐3,5,6,8a‐tetrahydro‐1H‐oxazolo[3,4‐a]pyridin‐6‐yl)isoindoline‐1,3‐dione