Table 4.

Anti-TMV activity of compounds 1–5 on Nicotiana glutinosa leaf ^a.

No.	% Inhibition at 20 µM	IC50 (µM)
1	26.5 ± 2.8	55.3
2	44.4 ± 3.5	22.6
3	66.5 ± 4.0	14.2
4	52.3 ± 3.6	17.9
5	31.8 ± 3.3	43.4
Ningnanmycin	32.8 ± 3.0	37.2

^a All results are expressed as mean ± SD; n = 3.