Table 9. Cytotoxicity of the EtOAc extracts of actinobacterial metabolites under NaF^{a , b}.

Strain No.c	K562 (%)	2% NaF			3% NaF			8% NaF			10% NaF
		MCF-7(%)	A549 (%)	K562 (%)	MCF-7(%)	A549 (%)	K562 (%)	MCF-7(%)	A549 (%)	K562 (%)	MCF-7(%)	A549 (%)
OUCMDZ4173	32.88 ± 0.04	63.96 ± 0.17	−4.55 ± 0.37	48.50 ± 0.06	69.97 ± 0.28	−6.81 ± 0.02	−4.53 ± 0.19	45.53 ± 0.11	7.89 ± 0.09	2.47 ± 0.07	67.20 ± 0.09	18.25 ± 0.01
OUCMDZ4174	6.99 ± 0.12	58.46 ± 0.07	29.64 ± 0.05	58.54 ± 0.23	54.43 ± 0.03	−6.63 ± 0.24	11.36 ± 0.45	27.62 ± 0.18	43.90 ± 0.08	−3.55 ± 0.83	63.23 ± 0.29	17.39 ± 0.09
OUCMDZ4176	9.73 ± 0.07	76.67 ± 0.38	29.73 ± 0.36	−2.51 ± 0.59	71.91 ± 0.54	13.80 ± 0.04	36.81 ± 0.36	66.83 ± 0.65	36.64 ± 0.13	4.08 ± 0.58	72.68 ± 0.04	28.20 ± 0.06
OUCMDZ4177	8.43 ± 0.03	56.66 ± 0.01	13.86 ± 0.08	43.68 ± 0.56	46.93 ± 0.37	31.90 ± 0.12	1.82 ± 0.56	51.40 ± 0.05	10.15 ± 0.06	5.02 ± 0.54	51.79 ± 0.11	35.47 ± 0.15
OUCMDZ4179	21.67 ± 0.16	32.40 ± 0.92	42.81 ± 0.81	26.88 ± 0.04	74.63 ± 0.08	−282.72 ± 0.73	29.29 ± 0.62	63.17 ± 0.06	22.74 ± 0.06	1.62 ± 0.53	75.98 ± 0.012	13.51 ± 0.01

^aEach datum represents the average inhibition and the standard deviation of three independent experiment.

^bThe inhibitions of adriamycin (positive control) at 1 μM for K562, MCF-7 and A549 were 73%, 71% and 74%, respectively.

^cCultured in the actinobacterial medium 2#.