Table 1.

In vitro screening assay to identify hit compounds.

Cmpd #	X	R	n
2a	3-F		2
2b	2-F		2
2c	4-F		2
2d	3-F		4
2e	2-F		4
2f	4-F		4
2g	3-F		2
2h	2-F		2
2i	4-F		2
2j	3-F		2
2k	2-F		2
2l	4-F		2
2m	3-F		4
2n	2-F		4
2o	4-F		4
7 *	3-F		4
1 *	4-F		4
2p	4-F		4
2q	4-F		4
2r	4-F		4
2s	4-F		4
2t	4-F		4
2u	4-F		4	* Reference compounds