Table 6.

Antiviral properties of the tested compounds against SARS-CoV-2.

Entry	Compd.	IC50 (µM)a	CC50 (µM)b	SIc
1	6a	3.799	1377	362.5
2	6b	55.14	1313	23.8
3	6c	13.52	356.9	26.4
4	10a	219	1617	7.4
5	10b	3.417	566	165.6
6	10c	20.1	1517	75.5
7	Hydroxychloroquine	29.25	356.4	12.2
8	Chloroquine	19.78	377.7	19.1
9	Favipiravir	1382	2633	1.9

^aCC₅₀ = Cytotoxic concentration due to 50% growth compared to the control experiment.

^b IC₅₀ = Inhibitory concentration due to 50% growth compared to the control experiment.

^c SI (Selectivity index/therapeutical index) =$\frac{{\mathit{CC}}_{50}}{{\mathit{IC}}_{50}}$