Tripetch Kanchanapoom

Phenolic glycosides from Markhamia stipulata

From the leaves and branches of Markhamia stipulata, five verbascoside derivatives (markhamiosides A-E), and one hydroquinone derivative (markhamioside F) were isolated together with 13 known compounds. Their structural elucidation was based on analyses of chemical and spectroscopic data.

Benzoxazinoid glucosides from Acanthus ilicifolius

From the aerial parts of Acanthus ilicifolius, two benzoxazinoid glucosides, 7-chloro-(2R)-2-O-beta-D-glucopyranosyl-2H-1,4-benzoxazin-3(4H)-one and (2R)-2-O-beta-D-glucopyranosyl-5-hydroxy-2H-1,4-benzoxazin-3(4H)-one have been isolated, together with six known compounds. The structural elucidations were based on the analyses of spectroscopic data.

Lotthanongine, an unprecedented flavonoidal indole alkaloid from the roots of Thai medicinal plant, Trigonostemon reidioides

Abstract Lotthanongine, a novel flavonoidal indole alkaloid, was isolated from the roots of Trigonostemon reidioides (Euphorbiaceae) together with afzelechin-(4α→8)-afzelechin. The structural elucidations were based on analysis of the spectroscopic data.

Cucurbitane, hexanorcucurbitane and octanorcucurbitane glycosides from fruits of Trichosanthes tricuspidata

From the fruits of Trichosanthes tricuspidata, 14 cucurbitane glycosides (khekadaengosides A-J, M-N, cucurbitacin J 2-O-beta-glucopyranoside and cucurbitacin K 2-O-beta-glucopyranoside), a hexanorcucurbitane glucoside (khekadaengoside K) and octanorcucurbitane (khekadaengoside L) were isolated along with two known cucurbitane glucosides (cucurbitacin 2-O-beta-glucopyranoside and 25-O-acetyl-cucurbitacin 2-O-beta-glucopyranoside). Structural elucidations were based on chemical and spectroscopic analyses.

Megastigmane, aliphatic alcohol and benzoxazinoid glycosides from Acanthus ebracteatus

From the aerial part of Acanthus ebracteatus, a megastigmane glycoside (ebracteatoside A), three aliphatic alcohol glycosides (ebracteatosides B-D), as well as 7-chloro-(2R)-2-O-beta-D-glucopyranosyl-4-hydroxy-2H-1,4-benzoxazin-3(4H)-one (7-Cl-DIBOA-Glc) were isolated together with 22 known compounds. Structural elucidations were based on analyses of spectroscopic data.

Megastigmane and iridoid glucosides from Clerodendrum inerme

From the aerial parts of Clerodendrum inerme, two megastigmane glucosides (sammangaosides A and B) and a iridoid glucoside (sammangaoside C) were isolated together with 15 known compounds. The structural elucidations were based on analyses of physical and spectroscopic data.

Iridoid and phenolic diglycosides from Canthium berberidifolium

An iridoid diglycoside, 6-O-beta-D-apiofuranosyl-mussaenosidic acid, and four phenolic diglycosides, canthosides A-D, were isolated from the aerial part of Canthium berberidifolium, along with seven known compounds. Structural elucidations were based on analyses of spectroscopic data.

Iridoid glucosides from Barleria lupulina

From the aerial part of Barleria lupulina, 8-O-acetyl-6-O-trans-p-coumaroylshanzhiside, saletpangponosides A-C and 8-O-acetylmussaenoside were isolated together with 13 known compounds. The structural elucidations were based on analyses of physical and spectroscopic data.

Lignan and megastigmane glycosides from Sauropus androgynus

A lignan diglycoside, (-)-isolariciresinol 3alpha-O-beta-apiofuranosyl-(1-->2)-O-beta-glucopyranoside, and a megastigmane glucoside, sauroposide, were isolated from the aerial part of Sauropus androgynus together with (+)-isolariciresinol 3alpha-O-beta-glucopyranoside, (-)-isolariciresinol 3alpha-O-beta-glucopyranoside, (+)-syringaresinol di-O-beta-glucopyranoside, guanosine and corchoionoside C. The structural elucidations were bases on analyses of physical and spectroscopic data.

Unprecedented furan-2-carbonyl C-glycosides and phenolic diglycosides from Scleropyrum pentandrum

Five unprecedented furan-2-carbonyl C-glycosides, scleropentasides A-E, and two phenolic diglycosides, 4-hydroxy-3-methoxybenzyl 4-O-β-D-xylopyranosyl-(1→6)-β-D-glucopyranoside and 2,6-dimethoxy-p-hydroquinone 1-O-β-D-xylopyranosyl-(1→6)-β-d-glucopyranoside, were isolated from leaves and twigs of Scleropyrum pentandrum together with potalioside B, luteolin 6-C-β-D-glucopyranoside (isoorientin), apigenin 8-C-β-D-glucopyranoside (vitexin), apigenin 6,8-di-C-β-D-glucopyranoside (vicenin-2), apigenin 6-C-α-L-arabinopyranosyl-8-C-β-D-glucopyranoside (isoschaftoside), apigenin 6-C-β-D-glucopyranosyl-8-C-β-D-xylopyranoside, adenosine and l-tryptophan. Structure elucidations of these compounds were based on analyses of chemical and spectroscopic data, including 1D and 2D NMR. In addition, the isolated compounds were evaluated for their radical scavenging activities using both DPPH and ORAC assays.