The present invention pertains to a compound of formula (I)
wherein R
1
, R
2
, R
3
, and R
4
are each hydrogen or sulfate monoester with the proviso that R
1
, R
2
, R
3
, and R
4
cannot simultaneously be hydrogen, processess for their preparation and their use as pharmaceuticals in the treatment of CNS disorders.
本发明涉及一种式(I)的化合物,其中R1、R2、R3和R4分别为氢或
硫酸单酯,但R1、R2、R3和R4不能同时为氢。该发明还涉及制备该化合物的方法以及将其用作治疗中枢神经系统疾病的药物。