叔丁基-2-(甲基磺酰基)-2,6-二氢吡咯并[3,4-c]吡唑-5(4H)-羧酸叔丁酯

tert-butyl 2-(methylsulfonyl)-2,6-dihydropyrrolo[3,4-c]pyrazole-5(4H)-carboxylate