jasco p 2000 polarimeter (JASCO Inc)
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Jasco P 2000 Polarimeter, supplied by JASCO Inc, used in various techniques. Bioz Stars score: 99/100, based on 27348 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Average 99 stars, based on 27348 article reviews
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other:Article Title: Four New Naphthalene Glycosides From the Green Walnut Husks of Juglans mandshurica Maxim. Article Snippet: Phytochemical investigation on the 75% EtOH fraction of the green walnut husks of Juglans mandshurica Maxim led to the isolation of four new naphthalene glycosides, Juglophenoside I ( 1 ), Juglophenoside II ( 2 ), Juglanoside R ( 3 ), juglanbioside F ( 4 ) as well as 13 known naphthalene compounds ( 5 17 ).. Structural elucidation of all compounds was carried out by spectroscopic methods such as 1D and 2D NMR spectroscopy (1 H-1 HCOSY, HSQC, and HMBC), and high resolution mass spectrometry.. Moreover the compounds were evaluated for their cytotoxic activities against three cancer cell lines BGC-823, Hela, and HepG-2. Article Title: Strebluses A and B as tyrosinase inhibitors from the stems of Streblus ilicifolius (S. Vidal) Corn Article Snippet: Optical rotations were measured using a Article Title: Discovery of undescribed steroids with anti-inflammatory and anti-hepatic fibrosis activities from the Formosan soft coral Sclerophytum leptoclados Article Snippet: The specific rotation was measured using a Article Title: Trichostatin Analogues From the Karst Cave Associated Streptomyces sp. DX6D14. Article Snippet: Six new trichostatin analogs, designated karstmycins I − M ( 1 − 6 ), together with eight known congeners ( 7 − 14 ), were obtained from Streptomyces sp. DX6D14 isolated from the soil of the karst cave.. The structures of the new compounds were elucidated through spectroscopic analysis, including high-resolution electron spray ionization mass spectrometry (HRESIMS) and nuclear magnetic resonance (NMR), and electronic circular dichroism (ECD) calculations.. All the isolates were evaluated for antibacterial and cytotoxic activities. Article Title: Palbinone derivatives from the roots of Paeonia lactiflora as potent α-glucosidase inhibitors Article Snippet: Bioassay-guided fractionation of the ethanolic extract from Paeonia lactiflora roots led to the isolation of two new octanortriterpenoids, paeonones C and D (1 and 2), together with two known analogs, paeonone A (3) and palbinone (4).. Structurally, compounds 1 and 2 represent rare highly degraded and oxidized triterpenoids, expanding the structural diversity of palbinone derivatives.. Their absolute structures were elucidated by extensive spectroscopic analyses and unambiguously confirmed by X-ray crystallographic diffraction. Article Title: The effect of trifluoroacetic acid on the endocyclic cleavage of ethyl 1-thio-β-d-manno-, gluco-, galacto- and β-l-fucopyranosides with bulky silyl groups. Article Snippet: Earlier we found that the treatment of ethyl 1-thio-β-D-galactopyranoside containing triisopropylsilyl (TIPS) groups at O-2 and O-3 with TFA–CH2Cl2 led to the corresponding 2,3-bis-O-silylated 1-thio-D-galactofuranoside.. However, when ethyl 1-thio-β-D-glucopyranoside with TIPS groups at O-2 and O-3 was treated under identical acidic conditions, formation of 2,3-bis-O-silylated 1-thio-β-D-glucofuranoside was accompanied by anomerization to ethyl 1-thio-α-D-glucopyranoside.. In current investigation we observed that the rearrangement of ethyl 1-thioβ-L-fucopyranoside with TIPS groups at O-2 and O-3 led to the anomeric mixture of the corresponding ethyl 1thio-L-fucofuranosides, which can be easily separated. Spectrophotometry:Article Title: New antibacterial 2-bromopyrrole-2-aminoimidazolinone alkaloids, 10 E -dispacamide B and (+)-10 E -dispacamide D, from a sponge Agelas nakamurai (Hoshino, 1985) Article Snippet: .. Optical rotations, IR spectra, and UV spectra were measured using a |
