从垂花水苏中分离出的三种毛喉素样二萜类化合物的结构和光谱归属
Structural and spectral assignment of three forskolin-like diterpenoids isolated from Plectranthus ornatus.
作者信息
Rijo Patrícia, Simões M Fátima, Rodríguez Benjamín
机构信息
Faculdade de Farmácia da Universidade de Lisboa, CECF, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal.
出版信息
Magn Reson Chem. 2005 Jul;43(7):595-8. doi: 10.1002/mrc.1600.
Three labdane diterpenoids were isolated from an acetone extract of Plectranthus ornatus. Their structures, closely related to that of forskolin, were determined by NMR studies. Unambiguous and complete assignments of the 1H and 13C NMR chemical shifts for these substances are presented. The assignments are based on 2D shift-correlated [1H, 1H-COSY, 1H, 13C-gHSQC-1J (C,H), 1H, 13C-gHMBC-(n)J (C,H) (n = 2 and 3)] and NOE experiments.
从硬毛香茶菜的丙酮提取物中分离出三种半日花烷二萜类化合物。通过核磁共振研究确定了它们与福斯可林密切相关的结构。给出了这些物质的¹H和¹³C核磁共振化学位移的明确且完整的归属。这些归属基于二维位移相关实验[¹H,¹H-COSY、¹H,¹³C-gHSQC-¹J(C,H)、¹H,¹³C-gHMBC-(n)J(C,H)(n = 2和3)]以及核Overhauser效应(NOE)实验。
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