Overview DP303c in Patients With HER2-positive Unresectable Locally Advanced, Relapsed, or Metastaticbreast Cancer Status: Not yet recruiting Trial end date: 2023-12-31 Target enrollment: Participant gender: Summary This is a study of DP303c in patients with HER2-positive advanced breast cancer. Phase: Phase 2 Details Lead Sponsor: CSPC ZhongQi Pharmaceutical Technology Co., Ltd.