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Evaluation anti-PEDV activities of 18 carbazole derivatives. Vero-81 cells were treated with 18 kinds (from No.1 to No.18) of carbazole derivatives, and then infected with EGFP-PEDV for 24 h. (a) The fluorescence in the cells were observed by fluorescence microscope. (b) RNA was extracted from PEDV-infected or non-infected vero-81 cells. The relative mRNA level of PEDV N was determined by qRT-PCR. * p < 0.05; ** p < 0.01; *** p < 0.001; ns not significant.
