About electron-withdrawing groups results of 6,832
29:05
27:12
18:48
23:41
21:10
23:40
16:46
30:19
24:51
40:07
39:22
28:30
25:59
22:31
22:13
22:28
23:01
19:46
36:32
23:52
28:26
27:45
25:18
24:09
42:27
111:30
210:55
84:32
59:13
59:40
82:37
204:55
60:09
142:17
65:55
81:21
52:13
77:22
57:30
42:28
60:46
59:01
53:41
49:42
46:52
50:14