5-Methyl-2,4-bis(methylsulfanyl)-tricyclo'[6.2.1.0 POT. 2,7]'undeca-4,9-diene-3,6-'dione POT. 1' - Richthofen, Andreas Albert Von; Cardoso Filho, José Eduardo Pandini; Marzorati, Liliana; Zukerman-Schpector, Júlio; Tiekink, Edward R. T; Di Vitta, Cláudio (Acta Crystallographica, 2010)