Table 2.

Biodistribution of ^99mTc labeled compound 5 in nude mice bearing human colonic cancer xenografts at various time intervals (% ID/g, n = 3, $\overline{x}\pm \text{SD}$).

Tissues	1 h	3 h	6 h	20 h
Stomach	10.10 ± 3.89	5.57 ± 0.89	1.27 ± 0.25	0.59 ± 0.18
Small intestine	1.29 ± 0.58	1.06 ± 0.11	3.09 ± 3.27	0.33 ± 0.14
Kidney	8.86 ± 3.23	7.07 ± 0.50	6.65 ± 0.41	5.89 ± 0.96
Liver	2.96 ± 0.99	3.65 ± 0.44	2.59 ± 0.07	1.99 ± 0.74
Lung	4.66 ± 0.24	8.24 ± 2.24	12.40 ± 4.94	4.56 ± 3.28
Muscle	0.72 ± 0.84	0.49 ± 0.34	0.44 ± 0.34	0.11 ± 0.04
Heart	0.64 ± 0.23	0.58 ± 0.09	0.34 ± 0.00	0.21 ± 0.05
Brain	0.07 ± 0.02	0.11 ± 0.06	0.07 ± 0.01	0.03 ± 0.01
Blood	1.26 ± 0.28	0.97 ± 0.18	0.55 ± 0.06	0.21 ± 0.06
Tumor	0.73 ± 0.10	0.97 ± 0.20	0.87 ± 0.04	0.62 ± 0.23