K. Peters et al., Crystal structure of trans-(1S,2S)-di(carboxy-(1R,2S,5R)-8-phenol-menthol)bicyclo[2.2.2][3,4a : 5,6a]dibenzooctane, C16H12[(COO)(C6H9CH3)(C3H5C6H5)](2), Z KRIST-NEW, 215(1), 2000, pp. 29-31
C50H58O4, orthorhombic, P2(1)2(1)2(1) (No. 19), a = 10.257(2) Angstrom, b =
14.163(3) Angstrom, c = 28.919(7) Angstrom, V = 4201.1 Angstrom(3), Z = 4,
R-gt(F) = 0.078, wR(F) = 0.056, T = 293 K.