... Volume: Page: ... Among them, 7 was the major compound isolated (4 g from a 50 L culture, compared to all other compounds, which were isolated in ... The 1 H NMR spectrum (Table S1) showed four signals at 8.40 (d, J = 7.7 Hz), 7.96 (td, J = 7.7, 1.9 Hz), 7.48 (ddd ...