Table 1.

HSP90 affinity (EC₅₀ [μm] with statistical analysis (r²)) and pharmacodynamic (PD) evaluation of pochoximes (measurement of Her-2 depletion in SkBr3 cells treated with the inhibitor overnight (EC₅₀, [μm]). See the Supporting Information for a table with structures.

Entry	Compound				Affinity [μm]	r2	PD [μm]
1	A1	B1	C1	D1	0.034	0.996	≤5.0
2				D18	0.540	0.994
3			C2	D1	0.588	0.991	> 10
4			C4	D2	0.886	0.997
5				D3	0.060	0.991	≤ 0.1
6				D4	0.070	0.983	≤ 0.5
7				D5	0.243	0.994	< 1.0
8				D6	0.238	0.990	< 5.0
9				D7	2.240	0.990	> 10
10				D8	5.757	0.995	> 10
11				D9	0.022[a]	0.988	≤ 0.5
12				D10	0.124	0.995	≤ 0.5
13				D11	0.070	0.998	≤ 0.5
14				D12	0.640	0.997	≤ 5.0
15				D13	> 10	0.991
16				D14	0.337	0.995	≤ 5.0
17				D15	0.128	0.997	≤ 1.0
18				D16	0.119	0.982	≤ 1.0
19				D17	0.219	0.998	≤ 0.5
20				D18	0.196	0.991	≤ 1.0
21				D19	0.094	0.982	≤ 5.0
22				D20	0.162	0.993	≤ 1.0
23				D21	2.992	0.993	> 10
24				D22	0.057	0.984	≤ 1.0
25				D23	0.140	0.991
26				D24	0.155	0.987	≤ 5.0
27				D25	0.116	0.980	≤ 1.0
28				D26	0.372	0.994	≤ 10
29		B2	C2	D1	1.936	0.997	> 10
30			C6		3.027	0.989	> 10
31		B3	C1	D18	0.200	0.989	≤ 1.0
32			C2	D1	0.196	0.994	≤ 1.0
33				D18	4.663	0.993	> 10
34			C4	D1	0.046	0.976	≤ 0.5
35		B4	C1		0.032	0.910
36			C2	D1	0.811	0.988
37			C4		0.021[a]	0.988	≤ 0.5
38			C5		0.587	0.987	≤ 5.0
39		B5	C1	D1	0.020[a]	0.965
40	A2	B1	C1		0.039	0.996
41			C2		0.096	0.994	≤ 5.0
42			C3		0.198	0.980	≤ 1.0
43			C5	D1	0.182	0.984	≤ 5.0
44			C7		0.079	0.931
45			C8		0.432	0.985	≤ 1.0
46		B2	C2	D1	0.543	0.981	≤ 5.0
47			C4		0.510	0.986	≤ 10
48		B3	C2	D18	0.900	0.976	> 10
49		B4	C1	D1	0.154	0.995	≤ 1.0
50			C2		1.751	0.998	≤ 10
51			C4		0.170	0.976	≤ 5.0
52			C5		1.722	0.996	> 10
53			C6		0.599	0.995	> 10
54		B5	C1		0.010[a]	0.980
55			C4		0.018[a]	0.980
56	radicicol				0.156	0.997
57	17-AAG				0.033	0.978

^[a]Based on the fact that the assay is performed by using 20 nm of HSP90, an IC₅₀ below 20 nm can not be reliably measured.