Shenzhen Zhongge Biotechnology Co. Ltd. has synthesized tyrosine-protein phosphatase non-receptor type 1 (PTPN1; PTP-1B) and/or PTPN2 (TCPTP) inhibitors reported to be useful for the treatment of cancer, obesity, atherosclerosis, type 1 diabetes, type 2 diabetes, neurodegeneration, metabolic syndrome and inflammatory bowel disease, among others.