517-83-9 Forbisen NSC14060 S. N. 475 [4,4'-Bi-1H-pyrazole]-3,3'-dione, 2,2',3,3'-tetrahydro-1,1',5,5'-tetramethyl-2,2'-diphenyl- [4,4'-Bi-3-pyrazoline]-5,5'-dione, 2,2',3,3'-tetramethyl-1,1'-diphenyl-