Bismuth Nitrate Catalysed Convenient Synthesis of 1,8-Dioxo Octahydro xanthene Derivatives . bpaschem [Internet]. 2021 Dec. 15 [cited 2024 Nov. 24];40(2):57-62. Available from: https://acspublisher.com/journals/index.php/bpaschem/article/view/8608