Usnic acid derivatives are effective inhibitors of tyrosyl-DNA phosphodiesterase 1 - Zakharenko, A L; Luzina, O A; Sokolov, D N; Zakharova, O D; Rakhmanova, M E; Chepanova, A A; Dyrkheeva, N S; Lavrik, O I; Salakhutdinov, N F (Russ J Bioorg Chem, 2017)