“…When administered orally in combination with cisplatin or cyclosporine A, it can easily cause thrombocytopenia and mucosal inflammation, and the treatment window is narrow, limiting its clinical application (Horvat & Lesinski, 2022; Khairy et al., 2022; Peters, 2018; Zi et al., 2023); leflunomide is the only h DHODH inhibitor that has been marketed for the treatment of rheumatoid arthritis, but long‐term use can cause adverse reactions such as liver enzyme abnormalities, hypertension, diarrhea, and rash (Hong et al., 2023; Kilic et al., 2023; Lycke et al., 2023; Paik, 2021; Wu et al., 2023). Therefore, searching for efficient, low toxicity, and novel structure h DHODH inhibitors remains a research hotspot in the treatment of autoimmune diseases (Nair et al., 2023; Petrović et al., 2023; Rawdha et al., 2023).…”