Two new secondary metabolites from the fruits of mangrove Avicennia marina

2015 ◽  
Vol 70 (9) ◽  
pp. 691-694 ◽  
Author(s):  
Dong-Mei Yan ◽  
Cheng-Hai Gao ◽  
Xiang-Xi Yi ◽  
Wen-Pei Xie ◽  
Ming-Ben Xu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Caffeic Acid ◽  
Acid Derivative ◽  
Spectroscopic Analysis ◽  
Avicennia Marina ◽  
Chemical Investigation ◽  
Activity Assay ◽  
Cellular Antioxidant Activity ◽  
Caffeic Acid Derivative

AbstractFurther chemical investigation of the fruit of the mangrove Avicennia marina led to the isolation of a new caffeic acid derivative, maricaffeolylide A (1), and a new megastigmane derivative, maricyclohexene A (2). The structures of the isolates were elucidated on the basis of extensive spectroscopic analysis. The antioxidant activity of 1 and 2 was also evaluated using a cellular antioxidant activity assay, and catechol 1 showed antioxidant activity with an EC50 value of 24 ± 0.3 μm.

New caffeic acid derivative from Tithonia diversifolia (Hemsl.) A. Gray butanolic extract and its antioxidant activity

2017 ◽  
Vol 109 ◽  
pp. 1079-1085 ◽  
Author(s):  
Kriss Dayana Pantoja Pulido ◽  
Ana Julia Colmenares Dulcey ◽  
José Hipólito Isaza Martínez
Keyword(s):  
Antioxidant Activity ◽  
Caffeic Acid ◽  
Acid Derivative ◽  
Tithonia Diversifolia ◽  
Butanolic Extract ◽  
Caffeic Acid Derivative

scholarly journals The Influence of Methyl Jasmonate on Growth and Caffeic Acid Derivative Contents of In vitro Shoot and Roots in Echinaceae (Echinacea Purpurea)

2017 ◽  
Vol 51 (3s2) ◽  
pp. s513-s517 ◽  
Author(s):  
Tunhan Demirci ◽  
Serdar Özmen ◽  
Elif Gökcen Yılmaz ◽  
Özlem Aras Aşcı ◽  
Nilgün Göktürk Baydar
Keyword(s):  
Methyl Jasmonate ◽  
Caffeic Acid ◽  
Acid Derivative ◽  
Echinacea Purpurea ◽  
Caffeic Acid Derivative

THEORETICAL AND EXPERIMENTAL STUDY OF ELECTRICAL AND ELECTROCHEMICAL PROPERTIES OF (E)-3-(4, 5-DIHYDROXY-2-(PHENYLSULPHONYL) PHENYL) ACRYLIC ACID AS A NEW CAFFEIC ACID DERIVATIVE

2007 ◽  
Vol 06 (02) ◽  
pp. 255-268 ◽  
Author(s):  
SIAVASH RIAHI ◽  
MOHAMMAD REZA GANJALI ◽  
ABDOLMAJID BAYANDORI MOGHADDAM ◽  
PARVIZ NOROUZI
Keyword(s):  
Acrylic Acid ◽  
Caffeic Acid ◽  
Acid Derivative ◽  
Ir Spectrum ◽  
Electrode Potential ◽  
Density Functional ◽  
Vibrational Frequencies ◽  
Molecular Orbital Calculations ◽  
Electrode Potentials ◽  
Caffeic Acid Derivative

The electrode potentials of (E)-3-(4,5-dihydroxy-2-(phenylsulphonyl) phenyl) acrylic acid (DPA), as a new caffeic acid derivative, in aqueous solution have been calculated. DPA has two geometric structures, cis and trans. Since the cis structure of caffeic is unstable, it cannot be found in nature, but in this research, its electrode potential have been calculated theoretically. The calculations have been performed using ab initio molecular orbital calculations (HF), and density functional theory (DFT) with the inclusion of entropic and thermochemical corrections to yield free energies of redox reactions. The electrode potential was also obtained experimentally by means of an electrochemical technique (cyclic voltammetry) and it was 335 mV for trans structure. The theoretical and experimental values for the electrode potential of the studied molecule are in excellent agreement. Geometric parameters and vibrational frequencies values of DPA and (2E)-3-(3,4-dioxo-6-(phenylsulfonyl) cyclohexa-1,5-dienyl)acrylic acid (DPDA is the oxidized form of DPA), were computed using same methods. The calculated IR spectrum of DPA used for the assignment of IR frequencies was observed in the experimental FT-IR spectrum. Correlations between theoretical and experimental vibrational frequencies of DPA molecule were 0.996. The agreement mutually verifies the accuracy of the experimental method and the validity of the applied mathematical model.

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