In one of the year’s biggest deals, Bristol Myers Squibb Co. (BMS) is buying Turning Point Therapeutics Inc. for about $4.1 billion to get at a potential cancer blockbuster, repotrectinib. The oral tyrosine kinase inhibitor, Turning Point’s lead asset, targets ROS1 and TRK in treating ROS1-positive metastatic non-small-cell lung cancer. Once the deal closes, BMS’ acquisition of Turning Point would be the second largest of the year. The biggest remains Pfizer Inc.’s purchase of San Diego’s Arena Pharmaceuticals Inc. for $6.7 billion in March.