Parasubindoles A–G, Seven Eremophilanyl Indoles from the Whole Plant of Parasenecio albus
2018-09-10T00:00:00Z (GMT) by
Parasubindoles A–G (1–7), seven eremophilanyl indoles with an unprecedented 12H-cyclopentane[b]naphthalenespiro-1,3′-indole skeleton, were isolated from the whole plant of Parasenecio albus. Their structures with absolute configurations were elucidated by spectroscopic methods, single-crystal X-ray diffraction, and ECD analyses. Plausible biosynthetic pathways of 1–7 were postulated.