Irciniaplysins A-D: New Psammaplysin Derivatives from Philippine Marine Sponge Ircinia sp.

Four new psammaplysin derivatives (1-4) with fatty acyl substituents, designated irciniaplysins A-D, and three known psammaplysins (5-7) were isolated from a marine sponge Ircinia sp. Their structures were elucidated using extensive spectroscopic analyses. The positions of the double bonds and the branch points of the fatty acyl side chains were determined by GC-MS analysis of their fatty acid methyl ester (FAME) derivatives.

Role of trisaccharides in larval secretion of Lycaeides argyrognomon butterfly on ant attendance.

Several myrmecophilous insects participate in symbiotic relationships with ants that receive sugar-rich food rewards. For instance, certain aphid species secrete honeydew containing high concentration of melezitose, which acts as a potent feeding-stimulant and attractant for ants. Lycaenid butterfly larvae possess dorsal nectary glands that secrete sugar-rich droplets for tending ants.

Experimental verification of fiber coupling characteristics for FSO downlinks from the International Space Station.

Free-space optical (FSO) systems are compulsory to realize high capacity and interference-free communication links from low-Earth orbit (LEO) satellite constellations as well as spacecraft and space stations to the Earth. To be integrated with high-capacity ground networks, the collected portion of the incident beam should be coupled into an optical fiber. To accurately evaluate the signal-to-noise ratio (SNR) and bit-error rate (BER) performance metrics, the probability density function (PDF) of fiber coupling efficiency (CE) must be determined.

Two new sarasinosides from marine sponge .

Two new sarasinosides designated as 5,8-epoxysarasinoside () and 8,9-epoxysarasinoside () and four known sarasinosides were isolated from marine sponge , collected off the coast of Lipata, Surigao City, Philippines (9°49' North, 125°27' East). The structures were determined through extensive 2D NMR spectroscopy and HRMS. Both compounds exhibited low cytotoxicity against the HCT116 (colon) and A549 (lung) cancer cell lines.

Polyhydroxy Acids as Fabaceous Plant Components Induce Oviposition of the Common Grass Yellow Butterfly, Eurema Mandarina.

The common grass yellow butterfly, Eurema mandarina is a Fabaceae-feeding species, the females of which readily oviposit on Albizia julibrissin and Lespedeza cuneata in mainland Japan. We previously demonstrated that the methanolic leaf extracts of these plants, and their highly polar aqueous fractions strongly elicit female oviposition. Furthermore, the three subfractions obtained by ion-exchange chromatographic separation of the aqueous fraction have been found to be less effective alone, but synergistically stimulate female oviposition when combined.

Isolation of Fluorescent Benzoxazines with Neuroprotective Activity from the Olive Weevil .

The weevil poses a serious pest problem for olive cultivation in Japan. Two new racemic fluorescent benzoxazines, designated as pimeforazine A ((±)-) and pimeforazine B ((±)-), were successfully isolated from . Their structures, including the absolute configurations of their resolved enantiomers, were determined using spectroscopic methods, single-crystal X-ray diffraction, and electronic circular dichroism calculations.

Triterpenoid Saponins from the Fruits of Symplocos lucida as β-Glucuronidase Inhibitors.

A new triterpenoid saponin and five known ones were isolated from the fruits of Symplocos lucida (Thunb.) Siebold & Zucc. Their structures were determined based on the results of spectroscopy analysis, chemical conversions, and X-ray crystallographic analyses.

Sex pheromones from male forewings of the Common Grass Yellow Eurema mandarina.

The common grass yellow Eurema mandarina has a characteristic patch (sex brand) composed of specialized scales (androconia) and wing intermembranous cells on the ventral surface of its male forewing. This structure is specific to males and is thought to release compounds that induce female mate acceptance. However, no study has demonstrated that these compounds function as sex pheromones in the genus Eurema.

Electrospray ionization mass spectrometry and nuclear magnetic resonance spectroscopy data for anacardic acid derivatives.

The data presented here are related to the research paper entitled "Janohigenins: Long-chain anacardic acid derivatives with neuroprotective activity from seeds" (Ohta et al., 2021). In this data article, we provide electrospray ionization mass spectrometry (ESIMS) and 1D and 2D nuclear magnetic resonance (NMR) spectroscopy data of four new anacardic acid derivatives, janohigenins isolated from the seeds of .

Chemical Identity of Cuticular Lipid Components in the Mimetic Swallowtail Butterfly Papilio polytes.

The swallowtail Papilio polytes shows Batesian and female-limited polymorphic mimicry. In Japan, P. polytes females have two different forms: the cyrus form is non-mimetic and resembles males, whereas the polytes form mimics Pachliopta aristolochiae and Byasa (Atrophaneura) alcinous as unpalatable models.

Paralemnolins X and Y, New Antimicrobial Sesquiterpenoids from the Soft Coral .

The organic extracts of the Red Sea soft coral has led to the identification of two neolemnane-type sesquiterpenoids: paralemnolins X and Y (, ). In addition to these newly characterized compounds, ten known metabolites (-) were isolated. Previously reported compounds were elucidated by literature comparison of spectroscopic data (1D and 2D NMR as well as MS data).

Oxygenated Cembrene Diterpenes from Cytotoxic Sarcoconvolutum A-E.

The soft coral genus contains the enzymatic machinery to synthesize a multitude of cembrene-type diterpenes. Herein, highly oxygenated cembrenoids, sarcoconvolutum A-E (-) were purified and characterized from an ethyl acetate extract of the red sea soft coral, . Compounds were assemblies according to spectroscopic methods including FTIR, 1D- and 2D-NMR as well as HRMS.

Janohigenins: Long-chain anacardic acid derivatives with neuroprotective activity from Ophiopogon japonicus seeds.

Eight hitherto undescribed long-chain anacardic acid derivatives, janohigenins, were isolated from the endosperm of Ophiopogon japonicus seed, and their structures were elucidated employing spectroscopic and chemical methods. The neuroprotective activity of the isolated compounds was evaluated against rotenone-induced cellular damage in SH-SY5Y human neuroblastoma cells. Janohigenins exhibited noticeable neuroprotection at 1 μM.

Results of Mechanical Thrombectomy in Patients Aged ≥80 Years.

Objective: The effectiveness of mechanical thrombectomy (MT) for anterior circulation large vessel occlusion (LVO) is controversial in elderly patients. The aim of this study was to evaluate the efficacy of MT in octogenarians.

Methods: One hundred and sixty-five patients who underwent MT for anterior circulation LVO between May 2014 and August 2019 at our institution were evaluated.

Asaroidoxazines from the Roots of Induce Apoptosis in Human Neuroblastoma Cells.

Plants in the family Aristolochiaceae contain phenanthrene skeleton-containing chemical constituents that exhibit nephrotoxic, carcinogenic, mutagenic, anti-inflammatory, and cytotoxic effects. Two new phenanthrene-containing 1,2-oxazin-6-ones, designated as asaroidoxazine A () and asaroidoxazine B (), and a known aristolactam, 5-methoxyaristololactam I (), were isolated from the roots of . The structures of compounds and were determined using spectroscopic methods and X-ray crystallography.

Carotane sesquiterpenes from : analysis as SARS-CoV-2 binding inhibitors.

Two sesquiterpenes, 8α-anisate-dauc-4-ene-3,9-dione (webiol anisate) (1) and 10α-acetoxy-6α-benzoate-jaeschkeanadiol (2) as well as, ten known analogues (3-10), and two sesquiterpene coumarins (11-12) were isolated from an organic root extract of (Fam. Apiaceae). Chemical structures were elucidated based on IR, 1D- and 2D-NMR and HRMS, spectroscopic analyses.

Nuclear magnetic resonance spectroscopy and mass spectrometry data for sulfated isoguanine glycosides.

The data presented here are related to the research paper entitled "Rare sulfated purine alkaloid glycosides from pupal case" [1]. In this data article, we provide 1D and 2D nuclear magnetic resonance (NMR) spectroscopy and electrospray ionization mass spectrometry (ESIMS) data of three undescribed sulfated purine alkaloids, locustoside A disulfate, saikachinoside B disulfate, and saikachinoside A trisulfate isolated from the pupal case of the wild bruchid seed beetle (Chrysomelidae, Bruchinae) infesting the seed of Miquel (Fabaceae).

NMR and ESIMS data for bisabolane-type sesquiterpenoids.

The data presented here are related to the research paper entitled "Norbisabolane and bisabolane sesquiterpenoids from the seeds of " [1]. In this data article, we provide 1D and 2D nuclear magnetic resonance (NMR) spectroscopy and electrospray ionization mass spectrometry (ESIMS) data of three undescribed norbisabolane- and bisabolene-type sesquiterpenoids, ashitabaol B-D isolated from the seeds of .

Sarcoehrenbergilides D-F: cytotoxic cembrene diterpenoids from the soft coral .

A solvent extract of the soft coral afforded cembrene diterpenoids, sarcoehrenbergilid D-F (1-3). Chemical structures were established by modern spectroscopic techniques with absolute stereochemistries determined by circular dichroism (CD) and time-dependent density functional theory electronic CD calculations (TDDFT-ECD). Cytotoxicity activities for 1-3 were evaluated against three human cancer cell lines: lung (A549), colon (Caco-2) and liver (HepG2).

The Role of N,N,N-Trimethylglycine in Oviposition of Eurema mandarina on Albizia julibrissin.

The common grass yellow Eurema mandarina (Lepidoptera: Pieridae) uses the silk tree Albizia julibrissin (Fabaceae) as a primary host in Japan. We previously reported that D-pinitol, a cyclitol found in fresh leaves of A. julibrissin, solely elicits moderate oviposition responses from females.

HPLC profiles and spectroscopic data of cassane-type furanoditerpenoids.

The data presented here are related to the research paper entitled "Hydroxylated furanoditerpenoids from the pupal case produced by the bruchid beetle inside the seed of " (Akihara et al., 2018) [1]. In this data article, we provide high-performance liquid chromatography (HPLC) profiles of seven undescribed hydroxylated furanoditerpenoids, caesalsauteolide, 2-hydroxycaesaljapin, 2,7-dihydroxycaesaljapin, 2-hydroxycaesalacetal, caesalsauterol, 6-acetylcaesalsauterol, norcaesalsauterol isolated from the pupal cases produced by and four known compounds, caesaljaponin A (Kamikawa et al.

Hydroxylated furanoditerpenoids from pupal cases produced by the bruchid beetle Sulcobruchus sauteri inside the seeds of Caesalpinia decapetala.

Seven undescribed hydroxylated cassane-type furanoditerpenoids were isolated from pupal cases formed from the secretion/excretion of the larvae of the wild bruchid seed beetle Sulcobruchus sauteri in infested Caesalpinia decapetala seeds, and their structures were elucidated by interpreting their spectra. The hydroxylated furanoditerpenoids found in the pupal cases were not present in the seeds of the host plant. Caesalacetal and caesaljapin obtained from the intact seeds exhibited larvicidal activity against the larvae of Aedes albopictus, while the hydroxylated furanoditerpenoids isolated from the pupal cases were inactive.

Cytotoxicity of abietane diterpenoids from Salvia multicaulis towards multidrug-resistant cancer cells.

Diterpenoids salvimulticanol (1) and salvimulticaoic acid (2) together with known diterpenoid (3-6) were isolated from Salvia multicaulis. Structures were elucidated by spectroscopic techniques including HRESIMS as well as 1D-, and 2D-NMR. In-vitro cytotoxicity was assayed against human cancer cell lines.

Sulfated Purine Alkaloid Glycosides from the Pupal Case Built by the Bruchid Beetle Bruchidius dorsalis Inside the Seed of Gleditsia japonica.

Three new sulfated isoguanine alkaloid glycosides, designated as saikachinoside A monosulfate (1), saikachinoside A disulfate (2), and locustoside B disulfate (3), have been isolated from the pupal case of the wild bruchid seed beetle Bruchidius dorsalis (Chrysomelidae, Bruchinae) infesting the seed of Gleditsia japonica Miq. (Fabaceae). Their structures were determined by spectroscopic methods and the inhibitory activity of 2 and 3 against acid phosphatase was evaluated.