Figure 1. Percent of survival (PS) of 100 ng/mL LPS-stimulated A549 and BEAS-2B cells in combination with 10 µM rhein (R), emodin (E), and the rest of synthetic products.

1a–c: pyrimidinyl carbamates; 2a–h: pyrimidinyl ureas for 18 hours. The chemical structures of the products under evaluation are shown.