Oddsmakers wasted no time figuring the market chances after Merck & Co. Inc. rolled out data from the phase III Litespark-011 study testing its oral hypoxia-inducible factor-2 alpha (HIF-2α) inhibitor, Welireg (belzutifan), when used with tyrosine kinase inhibitor Lenvima (lenvatinib, Eisai Co.) in advanced renal cell carcinoma.