K. Peters et al., Crystal Structure of (c-4a,c-8a)-1,4,4a,5,8,8a-hexahydro-1,4,10,10-tetramethyl-r-1,c-4 : t-5,t-8-dimethanophthalazine,[C7H8][C3N2(CH3)(4)], Z KRIST-NEW, 215(2), 2000, pp. 210-210
C14H20N2, orthorhombic, Pnma (No. 62), a = 19.647(3) Angstrom, b = 8.727(2)
Angstrom, c = 7.182(1) Angstrom, V = 1231.4 Angstrom(3), Z = 4, R-gt(F) =
0.079, wR(F) = 0.079, T = 293 K.