18180-71-7 2H-Pyrazino(1',2':1,5)pyrrolo(2,3-b)indole-1,4(3H,5aH)-dione, 9-chloro-6,10b,11,11a-tetrahydro-10b,11-dihydroxy-7,8-dimethoxy-2,3,6-trimethyl-3,11a-bis(methylthio)- Sporidesmin D