Table 1 Cytotoxicity (LC₅₀ in µg/mL) and the selectivity index (SI) of three limonoids isolated from Trichilia welwitschii and reference compounds (doxorubicin and puromycin) against cancer cell lines

89.17 ± 5.00^a

0.87

23.55 ± 5.77^a

2.99

85.22 ± 6.31^a

0.87

65.68 ± 3.64^b

1.07

75.82 ± 1.85^b

0.83

61.86 ± 4.14^b

1.14

9.35 ± 0.66^c

nd

1.06 ± 0.65^c

66.42

5.32 ± 0.90^d

176.03

1.15 ± 0.17^c

61.23