7477-67-0 NSC37393 [4,4'-Bi-2-pyrazoline]-5,5'-dione, 3,3'-dimethyl-1,1'-diphenyl- [4,4'-Bi-3H-pyrazole]-3,3'-dione, 2,2',4,4'-tetrahydro-5,5'-dimethyl-2,2'-diphenyl-