(2,2)-PARACYCLOPHANE,4,5,12,13-TETRAETHOXYCARBONYL InChI=1/C28H32O8/c1-5-33-25(29)21-17-9-10-18(22(21)26(30)34-6-2)15-16-20-12-11-19(14-13-17)23(27(31)35-7-3)24(20)28(32)36-8-4/h9-12H,5-8,13-16H2,1-4H tetraethyl tricyclo[8.2.2.2~4,7~]hexadeca-1(12),4,6,10,13,15-hexaene-5,6,11,12-tetracarboxylate tricyclo[8.2.2.2~4,7~]hexadeca-4,6,10,12,13,15-hexaene-5,6,11,12-tetracarboxylic acid, tetraethyl ester