Outcome Research to Confirm the Anti-anginal Effect of T89 in Patients With Stable Angina

This is a multi-center, double-blind, randomized, placebo-controlled, parallel-group phase 3 clinical study to confirm the safety and efficacy of T89 in patients with stable angina pectoris, with an extended open-label period to evaluate the long-term safety of T89. This study includes three main periods: the first study period is a 3-week single-blind qualifying run-in period to screen eligible stable angina patients by exercise tolerance test (ETT). The second study period is a 8-week double-blind treatment period to evaluate the efficacy and safety of T89 in patients with stable angina by ETT. And, the last study period is a 44-week open-label period to observe long-term use safety of T89.