Table 3.

The inhibitory activity of compounds 7a~7j to TMV.

Compd	Concentration (mg/mL )	Inhibition rate（%）
7a	0.5	38.42
7b	0.5	42.00
7c	0.5	31.55
7d	0.5	34.70
7e	0.5	25.00
7f	0.5	39.60
7g	0.5	31.60
7h	0.5	36.80
7i	0.5	42.49
7j	0.5	33.92
Ningnanmycin	0.5	54.51