Abbvie Inc. and Simcere Zaiming Pharmaceutical Co. Ltd. are part of the volley of large deals accompanying the opening of the 43rd annual J.P. Morgan Healthcare Conference in San Francisco. The two have agreed to develop SIM-0500, a humanized GPRC5D-BCMA-CD3 trispecific antibody, which is in phase I studies in the U.S. and China to treat refractory multiple myeloma.