C ₁₇ H ₁₆ Cl ₂ N ₂ O ₄, monoclinic, P 2 ₁ / c (no. 14), a = 8. 0893 (1) Å, b = 26. 1791 (3) Å, c = 8. 2311 (1) Å, β = 98. 002 (1) °, V = 1726. 13 (4) Å ^3, Z = 4, R ₆ₓ (F) = 0. 0343, w R ₑ₄₅ (F ^2) = 0. 0904, T = 160 K.
Al-Wahaibi et al. (Fri,) studied this question.