An imaging or contrast agent comprising a stereoisomer of a compound with at least one chiral centre, wherein said stereoisomer is in stereoisomeric excess and causes fewer adverse side effects on administration, or is less chemotoxic, than at least one other stereoisomer of said chiral compound.
一种成像或对比剂,包括至少一个手性中心的化合物的立体异构体,其中所述的立体异构体具有立体异构过量,并且在给药时引起的不良副作用较少或比该手性化合物的至少另一个立体异构体的
化学毒性更小。