158906-40-2 1H-Benzo(a)fluorene-4,11-dione, 2,3-dihydro-3-methyl-1,2,6,7-tetrahydroxy- 2,3-Dihydro-3-methyl-1,2,6,7-tetrahydroxy-1H-benzo(a)fluorene-4,11-dione Fluostatin b