Supporting information Stagonolides J and K and Stagochromene A, two New Natural Substituted Nonenolides and a New Disubstituted Choromene-4,5-Dione Isolated from Stagonospora cirsii S-47 Proposed for the Biocontrol of Sonchus arvensis Anna Dalinova, † Vsevolod Dubovik, †,‡ Leonid Chisty, § Dmitriy Kochura, § Alexander Ivanov, ± Sergey Smirnov, ± Maria Petrova, † Andrey Zolotarev, ± Antonio Evidente, # Alexander Berestetskiy † † All-Russian Institute of Plant Protection, Russian Academy of Agricultural Sciences, Pushkin, Saint-Petersburg 196608, Russian Federation ‡ Higher School of Technology and Energy (HSTE), Saint Petersburg State University of Industrial Technologies and Design, Saint-Petersburg 198095, Russian Federation § Research Institute of Hygiene, Occupational Pathology and Human Ecology, Federal Medical Biological Agency, p/o Kuz’molovsky, Saint-Petersburg 188663, Russian Federation ± St. Petersburg State University, Universitetsky Av. 26, St. Petersburg, 198504, Russia # Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant’Angelo, Via Cintia 4, 80126 Napoli, Italy Figure 1 – 1 H NMR spectrum of compound 1 Figure 2 – 13 C NMR spectrum of compound 1 Figure 3 – COSY spectrum of compound 1 Figure 4 – HMQC spectrum of compound 1 Figure 5 – HMBC spectrum of compound 1 Figure 6 – DEPT spectrum of compound 1 Figure 7 - NOESY spectrum of compound 1 Figure 8 – ESIMS of compound 1 recorded in positive ion mode Figure 9 – UV spectrum of compound 1 Figure 10 – HR ESIMS of compound 1 recorded in positive ion mode Figure 11 – IR spectrum of compound 1 Figure 12 – 1 H NMR spectrum of compound 2 Figure 13 – 13 C NMR spectrum of compound 2 Figure 14 – COSY spectrum of compound 2 Figure 15 – HSQC spectrum of compound 2