Yi-Ming Li

Iridoid glycosides from Scrophularia ningpoensis

Three new minor iridoids were isolated from the roots of Scrophularia ningpoensis. They were elucidated as 8-O-feruloylharpagide, 8-O-(2-hydroxy-cinnamoyl)harpagide and 6-O-α-d-galactopyranosylharpagoside.

Phenylpropanoid glycosides from Scrophularia ningpoensis

Three phenylpropanoid glycosides named ningposides A (3-O-acetyl-2-O-feruloyl-alpha-L-rhamnopyranose), B (4-O-acetyl-2-O-feruloyl-alpha-L-rhamnopyranose) and C (3-O-acetyl-2-O-p-hydroxycinnamoyl-alpha-L-rhamnopyranose) along with the known compounds sibirioside A, cistanoside D, angoroside C, acteoside, decaffeoylacteoside and cistanoside F were obtained from the roots of Scrophularia ningpoensis.

Two new N-oxide Lycopodium alkaloids from Huperzia serrata

Two new Lycopodium alkaloids, N-oxidehuperzine E (1) and N-oxidehuperzine F (2), along with two known alkaloids, huperzines E (3) and F (4), were isolated from Huperzia serrata (Thunb.) Trev. Their structures were elucidated by spectroscopic and chemical transformations.

Two novel iridoids from Scrophularia buergeriana

Abstract Two new iridoid-related compounds with a new carbon skeleton, buergerinin F(1) and G(2) were isolated from the roots of Scrophularia buergeriana Miq., and their structures were determined by spectroscopic means as well as by X-ray crystallographic analysis. The 1H, 13C NMR and EI-MS data of 1 and 2 are given.