Table 7. Inhibition Activity of Compounds 3b, 5a, 5b, 11a, 11b, and TMP at Different Concentrations on the DHFR Enzyme.

compd no.	10 (μg/mL), %	1 (μg/mL), %	0.1 (μg/mL), %	0.01 (μg/mL), %
3b	81.47	60.91	33.38	17.89
5a	75.89	57.27	41.84	29.97
5b	79.44	64.97	37.44	19.80
11a	71.81	66.96	44.13	29.59
11b	60.08	31.25	19.26	12.37
TMP	88.07	66.11	43.02	25.51