Table 4. Experimental details.

	1	2
Crystal data
Chemical formula	C23H25Br2NO2	C31H29BrN2O4
M r	507.26	573.47
Crystal system, space group	Monoclinic, P21/n	Monoclinic, P21/n
Temperature (K)	153	153
a, b, c (Å)	13.367 (2), 19.966 (3), 16.919 (4)	12.899 (2), 12.9748 (15), 16.763 (3)
β (°)	106.099 (15)	109.168 (13)
V (Å3)	4338.5 (14)	2649.9 (7)
Z	8	4
Radiation type	Mo Kα	Mo Kα
μ (mm−1)	3.76	1.59
Crystal size (mm)	0.40 × 0.23 × 0.17	0.18 × 0.18 × 0.15
Data collection
Diffractometer	Stoe IPDS 2T	Stoe IPDS 2
Absorption correction	Integration	Integration
Tmin, Tmax	0.324, 0.472	0.695, 0.844
No. of measured, independent and observed [I > 2σ(I)] reflections	48044, 8523, 5961	26391, 4941, 3442
R int	0.067	0.115
(sin θ/λ)max (Å−1)	0.617	0.606
Refinement
R[F2 > 2σ(F 2)], wR(F 2), S	0.036, 0.080, 1.02	0.056, 0.129, 1.12
No. of reflections	8523	4941
No. of parameters	516	346
No. of restraints	5	0
H-atom treatment	H-atom parameters constrained	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.78, −0.85	0.38, −0.67

Computer programs: X-AREA and X-RED (Stoe, 2009 ▸), SHELXT2018/2 (Sheldrick, 2015 ▸a), SHELXL2018/3 (Sheldrick, 2015 ▸b), XP (Sheldrick, 2008 ▸), WinGX (Farrugia, 2012 ▸), publCIF (Westrip, 2010 ▸) and shelXle (Hübschle et al., 2011 ▸).