Results 111 to 120 of about 22,717 (244)
ChemPhotoChem, Volume 10, Issue 10, October 2026.We investigated the vibrational dynamics of 4‐(dicyano‐methylen)‐2‐methyl‐6‐(4‐dimethylaminostyryl)‐4H‐pyran (DCM) upon one‐photon excitation (1PE) at 515 nm and upon two‐photon excitation (2PE) at 1030 nm in the spectral range of the nitrile vibrations. Vibrational dynamics of the two nitrile vibrations are traced in real‐time up to 7 ns.
Mathias Hartmann +6 more
wiley +1 more source
, 2015 Synthesis of two new amino acids, containing pyran rings, is reported from carbohydrate derivatives. The cis-3-amino-pyran-2-carboxylic acid (cis-APyC) was prepared from (R)-glyceraldehyde derivative, using nucleophilic substitution reaction for pyran ...
Marumamula Hanumaiah (734857) +2 more
core +1 more source
MicrobiologyOpen, Volume 15, Issue 5, October 2026.An endophytic fungus (Daldinia sp.) was isolated from the leaves of Avicennia officinalis collected from mangrove forests of Goa. The ethyl acetate extract of Avicennia officinalis (AO‐EA) of the identified endophyte demonstrated antibacterial and antibiofilm activity against Escherichia coli and Shigella sp.
Nickita Dutta +3 more
wiley +1 more source
Synthesis of Novel Hybrid 4H-Pyran-lipoic and 4H-Pyran-azetidine Derivatives
, 2017 In this study, a molecular hybridization strategy was used to design and synthesize two novel series of hybrid compounds: 4H-pyran-lipoic and 4H-pyran-azetidine, employing ammonium hydroxide and involving the participation of aldehydes, malononitrile ...
Yolanda Alcaraz +7 more
core +1 more source
Journal of Food Science, Volume 91, Issue 10, October 2026.ABSTRACT Anthocyanins are plant derived biomolecules that play roles in pollination and protection against ultraviolet light (UV) radiation, as well as reactive oxygen and nitrogen species (ROS and RNS, respectively). Cyanidin 3‐O‐glucoside (C3G), a common anthocyanin in the diet, exhibits antioxidant capacity that depends on its chemical structure ...
Eiko Osawa‐Martínez +6 more
wiley +1 more source
A modular UDP‐glycosyltransferase and cytochrome P450 system for soyasaponin C‐22 modification
The Plant Journal, Volume 128, Issue 1, October 2026.SUMMARY Soybean (Glycine max (L.) Merr.) produces triterpenoid saponins, called soyasaponins, which are categorised as 2,3‐dihydro‐2,5‐dihydroxy‐6‐methyl‐4H‐pyran‐4‐one (DDMP) saponins and group A saponins based on the chemical modifications at the C‐22 position of their triterpene skeleton.
Susumu Hiraga +13 more
wiley +1 more source
Vibrational and structural study of 2-amino-4H-pyran derivatives
, 2013 Seven 2-amino-4H-pyran derivatives have been studied by IR and Raman spectroscopy and the crystal structure of one (2-amino-3,5-dicyano-4-isopropyl-6-methyl-4H-pyran) has been determined by X-ray diffraction.
Seoane Prado, Carlos +4 more
core +1 more source
6-Unsubstituierte 2H-Pyran-2-one Synthese und Reaktivität
CHIMIA, 1992 Although the 2H-pyran-2-ones have been known for more than 100 years, their importance as versatile intermediates was not widely recognized before the sixties of this century.
Vratislav Kvita, Walter Fischer
doaj +2 more sources
EFSA Journal, Volume 24, Issue 10, October 2026.Abstract The conclusions of the European Food Safety Authority (EFSA) following the peer review of the initial risk assessments carried out by the competent authorities of the rapporteur Member State, Sweden, and co‐rapporteur Member State, Netherlands, for the pesticide active substance Trichoderma afroharzianum (formerly harzianum) T‐22 are reported.
European Food Safety Authority (EFSA) +47 more
wiley +1 more source
, 2016 4-Amino- and 4-guanidino-4H-pyran-6-carboxamides 4 and 5 related to zanamivir (GG167) are a new class of inhibitors of influenza virus sialidases. Structure−activity studies reveal that, in general, secondary amides are weak inhibitors of both influenza ...
Helen Weston (3020616) +18 more
core +1 more source