HER2-Inhibitor-1 is primarily used in cancer research and treatment, specifically targeting HER2-positive cancers such as breast and gastric cancers. It works by blocking the HER2 receptor, which is often overexpressed in these cancers, thereby inhibiting the signaling pathways that promote tumor growth and survival. This compound is valuable in preclinical studies for understanding HER2-driven cancer mechanisms and evaluating the efficacy of potential therapeutic agents. Additionally, it serves as a tool in drug development to design and optimize HER2-targeted therapies, contributing to the advancement of personalized medicine for cancer patients.