STRUCTURE–ACTIVITY RELATIONSHIPS OF NATURAL C-9-METHYL-SUBSTITUTED 10-MEMBERED LACTONES AND THEIR SEMISYNTHETIC DERIVATIVES ArticleFedorov Anatoly, Dubovik Vsevolod, Smirnov Sergey, Chisty Leonid, Khrustalev Victor, Slukin Anton, Alekseeva Alena, Stepanycheva Elena, Sendersky Igor, Berestetskiy Alexander, Dalinova AnnaJournal of Natural Products. Том 87. 2024. С. 914-923