HIF-1 2α-IN-1, an orally active compound, functions as an inhibitor of HIF-2α. Its inhibitory effect on HIF-2α activity is significant, with an IC 50 value of 0.92 μM. Furthermore, HIF-1 2α-IN-1 has the ability to decrease HIF-1α levels. This compound is particularly valuable for research on clear cell renal cell carcinoma (ccRCC) [1].