Abstract C 18 H 24 N 2 O 5 , orthorhombic, P 2 1 2 1 2 1 (no. 19), a = 8.47960(10) Å, b = 10.58540(10) Å, c = 19.3710(2) Å, V = 1738.74(3) Å 3 , Z = 4, R gt ( F ) = 0.0243, wR ref ( F 2 ) = 0.0633, T = 150(10) K.
Li et al. (Fri,) studied this question.