. 2014 Nov 11;5(12):1308–1312. doi: 10.1021/ml500388q

Table 1. Structure–Activity Relationship (SAR) on the Urea Domain of 7.

graphic file with name ml-2014-00388q_0008.jpg

compd	R	DSC ΔT_m (°C)^a	FP IC₅₀ (μM)^b
7	p-CF₃C₆H₄	2.9	4.5
8	m-CF₃C₆H₄	0.2	>25
9	o-CF₃C₆H₄	0.2	>50
10	Ph	0.2	>50
11	p-MeOC₆H₄	0.2	>50
12	1-Np	–0.1	>50
13	2-Np	0.8	>25

Differential scanning calorimetry (DSC) assay: 250 μM compound and 25 μM MCL1 (173–329) in 25 mM Hepes, pH 7.4, 100 mM NaCl, 0.1 mM TCEP, and 4% DMSO.

FP assay: Serial dilutions of compound, with a top concentration of 50 μM, were preincubated for 30 min with 200 nM MCL1 and 25 nM TAMRA-Noxa in 25 mM Hepes, pH 7.4, 100 mM NaCl, 0.005% Tween 20, and 2% DMSO.