New podophyllotoxin and epipodophyllotoxin derivatives with substituted isoxazole fragments. - Zefirov, N. A.; Nurieva, E. V.; Mamaeva, A. V.; Vasilenko, D. A.; Sadovnikov, K. S.; Averina, E. B.; Kolchanova, A. Yu.; Milaeva, E. R.; Zefirova, O. N. (Russian Chemical Bulletin, 2023)