rel-(1R,4S,5R,8S) – 1,4:5,8 – Diepoxy – 1,4,5,8 – tetrahydro – 2,3,6,7 – tetramethylidene – anthracene
rel-(1R,4S,5R,8S) – 1,4:5,8 – Diepoxy – 1,4,5,8 – tetrahydro – 2,3,6,7 – tetramethylidene – anthracene, (F. H. Kohnke, J. P. Mathias, J. F. Stoddart, A. M. Z. Slawin, D. J. Watts, and D. J. Williams), Acta Crystallogr. C. 1990, 46, 1046-1049.