Hutchmed Regulatory News (HCM)

Press Release

Chi-Med Highlights Oral Presentations at 2019 CSCO Annual Meeting

London: Wednesday, September 18, 2019: Hutchison China MediTech Limited ("Chi-Med") (AIM/Nasdaq: HCM) shares additional analyses from three completed and ongoing clinical studies of fruquintinib and savolitinib at the 22nd Annual Meeting of the Chinese Society of Clinical Oncology ("CSCO") on September 18 to 22, 2019 in Xiamen, China.

Fruquintinib (Elunate®): Two subgroup analyses will be presented from the FRESCO study, a randomized, double-blind, placebo-controlled, multi-center, Phase III study of fruquintinib efficacy and safety in third-line or above colorectal cancer ("CRC") patients.

The development of metastases is the main cause of death in patients with CRC, and about 70% of patients with CRC develop liver metastases during the course of their disease[1],[2]. Abstract 5278 is a subgroup analysis to determine the benefit of fruquintinib to patients with liver metastases on study entry. Liver metastases were present in 69% of the patients recruited into the study.

Fruquintinib demonstrated a statistically significant increase in overall survival ("OS"; 8.61 vs. 5.98 months; hazard ratio = 0.59, 95% CI: 0.45-0.77, p

Abstract 5517 is a subgroup analysis of the FRESCO results to explore whether patients in the fruquintinib group of the study experiencing hand-foot skin reaction ("HFSR") saw a greater survival benefit. These reactions of any grade developed in 52% of patients who completed at least one cycle of fruquintinib treatment.

The analysis indicated that patients who reported HFSR had a greater survival benefit from fruquintinib, showing statistically significant benefit in both median OS (11.24 vs. 7.54 months; hazard ratio = 0.57, 95% CI: 0.42-0.78; p

Results of the FRESCO study were initially presented in an oral presentation at the American Society of Clinical Oncology Annual Meeting on June 5, 2017 and published in The Journal of the American Medical Association, JAMA, in June 2018 (clinicaltrials.gov identifier: NCT02314819).

Fruquintinib is a highly selective and potent oral inhibitor of vascular endothelial growth factor receptor ("VEGFR") 1/2/3. VEGFR inhibitors play a pivotal role in blocking tumor-related angiogenesis, cutting off the blood supply that a tumor needs to grow rapidly. Fruquintinib has been designed to be a global best-in-class VEGFR inhibitor for many types of solid tumors. It was designed to improve kinase selectivity in comparison to other approved small molecule tyrosine kinase inhibitors, to minimize off-target toxicities, improve tolerability and provide more consistent target coverage. Chi-Med retains all rights to fruquintinib outside of China and is partnered with Eli Lilly and Company in China.

Savolitinib:

Abstract 5707 highlights updated preliminary efficacy and safety results from the ongoing China Phase II study of savolitinib monotherapy in NSCLC patients with mesenchymal epithelial transition receptor ("MET") Exon 14 skipping mutations who have failed prior systemic therapy or are unable to receive chemotherapy.

Savolitinib showed promising antitumor activity in this population with rapid and durable tumor response and disease control, anti-tumor activity in brain metastasis, and a generally tolerable safety profile with mostly grade 1 or 2 related treatment emergent adverse events. The study continues to enroll patients. Earlier results of this study were first presented on March 31, 2019 at the American Association of Cancer Research (AACR) Annual Meeting 2019 (clinicaltrials.gov identifier: NCT02897479).

Savolitinib is a potent and selective inhibitor of MET, an enzyme which has been shown to function abnormally in many types of solid tumors. In clinical studies to date in over 1,000 patients globally, savolitinib has shown promising signs of clinical efficacy in patients with MET gene alterations in lung cancer, kidney cancer, and gastric cancer with an acceptable safety profile. Chi-Med is currently testing savolitinib in global partnership with AstraZeneca, both as a monotherapy and in combinations.

About Chi-Med

Chi-Med (AIM/Nasdaq: HCM) is an innovative biopharmaceutical company which researches, develops, manufactures and markets pharmaceutical products. Its Innovation Platform, Hutchison MediPharma, has about 440 scientists and staff focusing on discovering, developing and commercializing targeted therapeutics and immunotherapies in oncology and autoimmune diseases. It has a portfolio of eight cancer drug candidates currently in clinical studies around the world. Chi-Med's Commercial Platform manufactures, markets, and distributes prescription drugs and consumer health products, covering an extensive network of hospitals across China.

Chi-Med is headquartered in Hong Kong and is dual-listed on the AIM market of the London Stock Exchange and the Nasdaq Global Select Market. For more information, please visit: www.chi-med.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements reflect Chi-Med's current expectations regarding future events, including its expectations for the clinical development of fruquintinib and savolitinib, plans to initiate clinical studies for fruquintinib and savolitinib, its expectations as to whether such studies would meet their primary or secondary endpoints, and its expectations as to the timing of the completion and the release of results from such studies. Forward-looking statements involve risks and uncertainties. Such risks and uncertainties include, among other things, assumptions regarding enrollment rates, timing and availability of subjects meeting a study's inclusion and exclusion criteria, changes to clinical protocols or regulatory requirements, unexpected adverse events or safety issues, the ability of drug candidates fruquintinib and savolitinib, including as a combination therapies, to meet the primary or secondary endpoint of a study, to obtain regulatory approval in different jurisdictions, to gain commercial acceptance after obtaining regulatory approval, the potential market of fruquintinib and savolitinib for a targeted indication and the sufficiency of funding. Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. For further discussion of these and other risks, see Chi-Med's filings with the U.S. Securities and Exchange Commission and on AIM. Chi-Med undertakes no obligation to update or revise the information contained in this press release, whether as a result of new information, future events or circumstances or otherwise.

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