Determine the structure of phosphorylated modification of icariin and its antiviral activity against duck hepatitis virus A

Table 2 A₅₇₀ values and virus inhibitory rate in DHAV test on DEHs

Group	Concentration^A (μg/mL)	A ₅₇₀	Virus inhibitory rate(%)	Group	Concentration^A (μg/mL)	A ₅₇₀	Virus inhibitory rate(%)
1	250	0.191 ± 0.026^c	1.72	2	1250	0.241 ± 0.026^c	0.92
	125	0.211 ± 0.032^bc	18.97		625	0.261 ± 0.010^c	19.27
	62.5	0.230 ± 0.016^b	35.34		312.5	0.365 ± 0.032^ab	114.68
	31.25	0.303 ± 0.013^a	98.28		156.25	0.388 ± 0.020^a	135.78
VC		0.189 ± 0.018^c		VC		0.240 ± 0.014^c
CC		0.305 ± 0.006^a		CC		0.349 ± 0.024^b

Data within a column without the same superscripts (a–c) differ significantly (p < 0.05)
^ab With ^a and ^b were no significant differences. ^bc With ^b and ^c were no significant differences
^A The safe concentration determined by prior cytotoxicity tests

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