Fig. 1

Chemical structure of OA and its effects on cell viability in a range of cell lines. (A) Chemical structure of OA. (B) Cell viability of Ishikawa, RL95-2, HEC-1 A, HEC-1B, and HEK293 cells after treatment with OA for 48 h. (C) Viability of Ishikawa cells after exposure to OA for 24 h, 48 h, and 72 h. (D) Viability of Ishikawa cells after 5-FU treatment for 48 h.