1 87U (3z,6z)-3-[(4-tert-butyl-1h-imidazol-5-yl)methylidene]-6-[[3-(4-fluorophenyl)carbonylphenyl]methylidene]piperazine-2,5-dione 1.000 2 8WR (3z,6z)-3-[(4-tert-butyl-1h-imidazol-5-yl)methylidene]-6-[[3-(phenylcarbonyl)phenyl]methylidene]piperazine-2,5-dione 0.971 3 PN6 (3z,6z)-3-benzylidene-6-[(5-tert-butyl-1h-imidazol-4-yl)methylidene]piperazine-2,5-dione 0.735