Table 1. The identified compounds were tested for their growth inhibition rate (%) for the MG-63 cancer cells at 10 μM by an MTT assay.

Compounds ID	7	8	9	10	11	12	13	5	Cisplatin b
Inhibition rate (%)	NI a	68.9 ± 7.8	48.7 ± 5.9	50.2 ± 3.1	88.7 ± 8.9	NH	67.8 ± 8.9	NI	79.5 ± 4.3

^aNI: No inhibition.

^bCisplatin was used as positive control, and the EC₅₀ is 5.42 μM, which was in line with the reference data.17