Bis[3,7-bis(cyclopropylmethyl)-7-aza-3-azoniaspiro[bicyclo[3.3.1]nonane-9,1'- cyclopentane]] (2E)-but-2-enedionate bis[(2E)-but-2-enedioic acid]

2C₁₉H₃₃N_21,C₄H₂O_42,2C₄H₄O₄

Jones, Peter G.Schön, UweFinner, Emil

Acta Crystallographica Section E (2004) 60, 8 o1285-o1287

a=10.6692(15)Å   b=17.257(2)Å   c=13.3990(18)Å

α=90.00°   β=99.70(2)°   γ=90.00°