wb 403400. Bad request. 401. Unauthorized. 403. Access denied. 429. Too many requests. Response samples. 200; 400; 401; 403; 429. Content type. applicationjson. Copy.WB403 (WB-403) is a novel and potent TGR5 activator with antidiabetic effects. It can improve glucose tolerance and decrease fasting blood glucose, postprandial blood glucose and HbA1c