Table 1.

Selectivity index against SARS-CoV of TCMs and Toona sinensis Roem extract

Number	TCMs or extracts	Form	CC50 (ug/ml)	EC50 (ug/ml)	SI*
1	Yin-Chiau-San	Boiled	>500	>500	>1
			>500	>500	>1
2	Pu-Zhi-Siau-Du-Yien	Boiled	>500	240	>2
			>500	219	>2
3	Ger-Gern-Hwang-Lein	Boiled	>500	134	>3
	-Hwang-Chin-Tang		>500	280	2
4	Sang-Zhiu-Yien	Boiled	>500	349	>1
			>500	326	>1
5	Huang-Lein-Zhei-Du-Tang	Boiled	>500	369	>1
			>500	349	>1
6	TSL-1	Boiled	>500	30	17
			>500	43	>12
7	TSL-1nm	Boiled	>500	37	>13
			>500	70	>7

“*” Indicates selectivity index. “>” Indicates greater.