Hiroko Shimomura

Phenolic glucosides from Prunus grayana

Abstract A new bitter phenylpropanoid glucoside, 2-(4-hydroxyphenyl)-ethyl-(6- O -caffeoyl)-β- D -glucopyranoside and a new bitter tannin-related compound, 3,4,5-trimethoxybenzoyl-β- D -glucopyranoside, have been isolated together with known compounds, 2-(3,4-dihydroxyphenyl)-ethyl-(6- O -caffeoyl)-β- D -glucopyranoside, 2-(3,4-dihydroxyphenyl)-ethyl-β- D -glucopyranoside and 6- O -caffeoyl- D -glucopyranose, from the bark of Prunus grayana . The structures of these compounds have been established on the basis of spectroscopic studies and chemical evidence.

Sesquiterpene lactones from pyrethrum flowers

Abstract Three new sesquiterpene lactones of the germacranolide-type [(11R)-11,13-dihydrotatridin-A, (11R)-11,13-dihydrotatridin-B and (11R)-6-O

Phenolic glycerides from Lilium auratum

Abstract Phenolic glycerides have been isolated from fresh bulbs of Lilium auratum . By spectral and chemical means, they have been identified as the new components, 1,2- O -diferuloylglycerol, a mixture of 1- O -feruloyl-2- O - p -coumaroylglycerol and 1- O - p -coumaroyl-2- O -feruloylglycerol, 1- O -feruloylglycerol and the known compounds, 1,3- O -diferuloylglycerol, 1- O -feruloyl-3- O - p -coumaroylglycerol and 1- O - p -coumaroylglycerol.

Phenylpropanoid glucose esters from Prunus buergeriana

Abstract Two new phenylpropanoid glucose esters, 6- O -caffeoyl-1- O - p -coumaroyl-β- d -glucopyranose, and 6- O - p -coumaroyl- d -glucopyranose, along with three known compounds, 1,6-di- O -caffeoyl-β- d -glucopyranose, 6- O -caffeoyl- d -glucopyranose and (2 R )-[(6- O -caffeoyl)-β- d -glucopyranosyloxy]benzeneacetonitrile were characterized from the bark of the Prunus buergeriana using spectroscopic methods.

Bitter phenylpropanoid glycosides from Lilium speciosum var. rubrum

Abstract Seven bitter ferulic acid esters of sucrose have been isolated from Lilium speciosum var. rubrum . These compounds were identified as 3,6′-diferuloylsucrose, 4-acetyl-3,6′-diferuloylsucrose, 6-acetyl-3,6′-diferuloylsucrose, 4′-acetyl-3,6′-diferuloylsucrose, 4,6-diacetyl-3,6′-diferuloylsucrose, 6,3′-diacetyl-3,6′-diferuloylsucrose and 4,6,3′-triacetyl-3,6′-diferuloylsucrose on the basis of spectroscopic studies.

Cyanogenic and phenylpropanoid glucosides from Prunus grayana

Abstract In a chemical examination of the bark ofPrunus grayana, three new phenylpropanoid glucosides, grayanoside A, grayanoside B and grayanin, have been isolated. The structures of these compounds have been established to be 2-(4-hydroxyphenyl)ethyl-(6-O-feruloyl)-β- D -glucopyranoside, 2-(3,4-dihydroxyphenyl)ethyl-(6-O-feruloyD-β- D -gluco and (2R)-[(6-O-caffeoyl)-β- D -glucopyranosyloxy]benzeneacetonitrile, respectively, on the basis of the spectroscopic studies and the chemical evidence.

Plant growth regulators from Heracleum lanatum

Abstract The plant growth regulating substances, pimpinellin, isopimpinellin, bergapten, isobergapten, vaginidiol, sphondin, scopoletin, umbelliferone, ferulic

Iridoid glucosides and phenylpropanoid glycosides in Ajuga species of Japan

Abstract Iridoid glucosides, reptoside, 8- O -acetylharpagide, and harpagide, and phenylpropanoid glycosides, verbascoside, desrhamnosylverbascoside, and 2- O -( p -coumaroyl)- d -glucose have been isolated from seven species of Ajuga growing in Japan. No harpagide was originally contained in the living specimens. The iridoid glucoside pattern of each species could be correlated to the stem characteristics of that species.

Lipid and steroidal constituents of Lilium auratum var. Platyphyllum AND L. tenuifolium

Abstract The chemical compounds in the bulbs of Lilium aidratum var. platyphyllum and L. tenuifolium have been analysed as part of a systematic study of the genus Lilium . The structures of two new phenylpropanoid glycerol glucosides, regaloside H and I from L. auratum var. platyphyllum , and two new polyhydroxylated steroidal glycosides, tenuifolioside A and B from L. tenuifolium have been elucidated on the basis of the spectroscopic analysis and some chemical transformations.

Steroidal saponins, pardarinoside A–G from the bulbs of Lilium pardarinum

Abstract Novel steroidal saponins, pardarinoside A–G have been isolated as the bitter ingredients from the fresh bulbs of Lilium pardarinum . Their structures have been determined by high field NMR techniques and a few chemical transformations to be 22- O -methyl-26- O -acetyl-(25 R )-5α-furost-3β,14α,17α,22α,26-pentaol 3- O -[α- l -rhamnopyranosyl(1→2)]-β- d -glucopyranoside, 22- O -methyl-26- O -acetyl-(25 R )-5α-furost-3β,17α,22α,26-tetraol 3- O -[α- l -rhamnopyranosyl(1→2)]-β- d -glucopyranoside, 2- O -methyl-26- O -acetyl-(25 R )-5α-furost-3β,14α,17α,22α,26-pentaol 3- O -[α- l -rhamnopyranosyl (1→2)] [β- d -glucopyranosyl (1→4)]-β- d -glucopyranoside, 22- O -methyl-26- O -acetyl(25 R )-5α-furost-3β,17α,22α,26-tetraol 3- O -[α- l -rhamnopyranosyl (1→2)] [β- d -glucopyranosyl (1→4)]-β- d -glucopyranoside, (25 R )-5α-spirost-3β,17α,21-triol 3- O -[α- l -rhamnopyranosyl (1→2)] [α- l -arabinopyranosyl(1→3)]-β- d -glucopyranoside, 22- O -methyl-26- O -acetyl-(25 R )-5α-furost-3β,14α,17α,22α,26-pentaol 3- O -[α- l -rhamnopyranosyl(1→2)][α- l -arabinopyranosyl(1→3)]-β- d -glucopyranoside, and 22- O -methyl-26- O -acetyl-(25 R )-5α-furost-3β,17α,22α,26-tetraol 3- O -[α- l -rhamnopyranosyl (1→2)]-[α- l -arabinopyranosyl(1→3)]-β- d -glucopyranoside. This is believed to be the first report of steriodal saponins from a Lilium species.