From Ligularia atroviolacea, four new eremophilendiolides, 81$-hydroxy-eremophil-3,7 (11)-dien-12,8α(14,6α)-diolide (1), 8β-methoxy-eremophil-3,7(11)-dien-12,8α(14,6α)-diolide (2), 8α-hydroxy-eremoph...From Ligularia atroviolacea, four new eremophilendiolides, 81$-hydroxy-eremophil-3,7 (11)-dien-12,8α(14,6α)-diolide (1), 8β-methoxy-eremophil-3,7(11)-dien-12,8α(14,6α)-diolide (2), 8α-hydroxy-eremophil-3,7(11)-dien-12,8lβ(14,6α)-diolide (3) and eremophil-3,7(11),8-trien-12,8 (14,6α)-diolide (4), as well as a known diolide (5) were isolated. Their structures were elucidated on the basis of 1D and 2D NMR as well as ESI-MS spectral data.展开更多
文摘From Ligularia atroviolacea, four new eremophilendiolides, 81$-hydroxy-eremophil-3,7 (11)-dien-12,8α(14,6α)-diolide (1), 8β-methoxy-eremophil-3,7(11)-dien-12,8α(14,6α)-diolide (2), 8α-hydroxy-eremophil-3,7(11)-dien-12,8lβ(14,6α)-diolide (3) and eremophil-3,7(11),8-trien-12,8 (14,6α)-diolide (4), as well as a known diolide (5) were isolated. Their structures were elucidated on the basis of 1D and 2D NMR as well as ESI-MS spectral data.