作者:V. Pattabhi、S. Banumathi、G. Mehta、S. Padma
DOI:10.1107/s0108270193007814
日期:1994.4.15
The crystal structures of endo,anti,syn-hepta-cyclo[10.6.1.1(5,8).1(14,17).0(2,11).0(4,9).0(13,18)]henicosa-4(9),-6,13(18),15-tetraene-3,10-dione, C21H18O2(I), and exo,syn,syn-hexacyclo[10.4.2. 1(5,8).0(2,11).0(4,9).0(13,16)]nona-deca-4(9),6,14,17-tetraene-3,10-dione, C19H16O2 (11), are reported. The packing of the molecules in both structures is stabilized by van der Waal's forces.