AZIMI, Seyyedeh Cobra; KEFAYATI, Hassan. Cellulose sulfuric acid: an efficient biopolymer-based catalyst for the synthesis of 5H-dibenzo[b,i]xanthene-tetraones and spiro[dibenzo[b,i]xanthene-13,3′-indoline]-pentaones under solvent free conditions. Iranian Journal of Catalysis, [S. l.], v. 3, n. 3, 2024. Disponível em: https://oiccpress.com/ijc/article/view/3763. Acesso em: 19 may. 2026.