185750-71-4 4H,8H-Imidazo(4,5-b)dipyrrolo(1,2-a:1',2'-d)pyrazine-2,8(3H)-dione, 10,11-dibromo-1,5,6,12a-tetrahydro-, (3aR,12aS)- 4H,8H-Imidazo(4,5-b)dipyrrolo(1,2-a:1',2'-d)pyrazine-2,8(3H)-dione, 10,11-dibromo-1,5,6,12a-tetrahydro-, (3aR-(3aR*,12aS*))- Dibromophakellstatin