Table 2. Estimate of selectivity index for natural product isolates.
| Compounds | IC50Toxoplasma gondii (µg/mL) | IC50 HFF cells (µg/mL) | Selectivity Index (SI) | |
| Rhapontin | 1.22 | 20.05 | 16.38 | SI >1 |
| Homobutein | 4.43 | 68.28 | 15.41 | SI >1 |
| Sulfuretine | 0.68 | 8.20 | 12.10 | SI >1 |
| Arbutin | 17.20 | 84.23 | 4.90 | SI >1 |
| Butein | 2.12 | 7.92 | 3.74 | SI >1 |
| Naringenin | 3.03 | 9.20 | 3.03 | SI >1 |
| Narasin | 0.74 | 2.09 | 2.84 | SI >1 |
| Stachydrine.HCl | 4.40 | 10.41 | 2.36 | SI >1 |
| Shikonin | 3.96 | 5.81 | 1.47 | SI >1 |
| Hesperitine | 13.66 | 12.42 | 0.91 | |
| Lasalocid A | 1.61 | 1.46 | 0.90 | |
| Ochratoxin A | 11.33 | 9.63 | 0.85 | |
| Radicicol | 4.90 | 2.58 | 0.53 | |
| Cephaeline.HBr | 0.95 | 0.45 | 0.47 | |
| Menadione | 44.70 | 17.93 | 0.40 | |
| Peruvoside | 0.37 | 0.11 | 0.30 | |
| Sulfadiazine | 185.20 | 53.35 | 0.29 | |
| Mitomycin C | 1.87 | 0.44 | 0.24 | |
| Gitoxigenin | 2.59 | 0.62 | 0.24 | |
| Pyrimethamine | 205.60 | 42.16 | 0.21 | |
| Strophantidin | 1.30 | 0.19 | 0.15 | |
| Diacetoxyscirpenol | 0.62 | 0.05 | 0.08 | |
| Tubericidin | 0.46 | 0.02 | 0.04 | |
| Capsiacin | ND | 9.69 | ND | |
| Curcumin | ND | ND | ND | |
| Resveratrol | 1.03 | ND | ND | |
| Genistin | 5.46 | ND | ND | |
| Eriodictyol | ND | ND | ND | |
| Andrographolide | 388.10 | ND | ND | |
| Syringetine-3-glucoside | 16.64 | ND | ND | |
| Piperine | 1.71 | ND | ND | |
| Aloe-emodine | 8.14 | ND | ND | |
| Neohesperidin | ND | ND | ND | |
| 5,6-Dehydrokawain | 4.22 | ND | ND | |
| Betulin | 224.40 | ND | ND | |
| Lavendustin A | 37.45 | ND | ND | |
| Gelsemine.HCl | 89.29 | ND | ND |
*ND – Not determined.