1-{[(1R,4S,5R,8S,12R,13R)-1,5-dimethyl-10-(trifluoromethyl)- 11,14,15,16-tetraoxatetracyclo[10.3.1.04,13.08,13]hexadec-9- en-9-yl]methyl}-4-{[1S,4R,5R,8R,12R,13S)-1,5-dimethyl-10-(tr ifluoromethyl)-11,14,15,16-tetraoxatetracyclo[10.3.1.04,13.0 8,13]methyl}piperazine NSC724779