Chemical structure and antioxidant activity of cephalopod skin ommochrome pigment extracts

Dania Marisol Esparza-Espinoza, Hisila Del Carmén Santacruz-Ortega, Jesús Enrique Chan-Higuera, José Luis Cárdenas-López, Armando Burgos-Hernández, Ángel A. Carbonell-Barrachina, Josafat Marina Ezquerra-Brauer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Significant opportunities exist in the use of seafood by-products to create new beneficial products. Moreover, cephalopod skin is a good source of bioactive compounds. The present study compares the chemical structure properties and antioxidant activity of pigments extracted from the skin of Octopus vulgaris (OVS) and Dosidicus gigas (DGS) with methanol-HCl (T1) and ethanol-HCl (T2). The solubility and spectroscopic analysis (UV-Vis and1H NMR) indicated that extracted pigments belonged to the ommochrome family. Xanthommatin, dihydroxanthommatin, and kynurenine compounds were identified in the extracts using correlated homonuclear spectroscopy (COSY). The results showed that OVS yielded a higher recovery rate of pigments with antioxidant activity (DPPH, ABTS, and FRAP) than DGS in both solvents. T1 extracted the highest level of antioxidant pigments. The kynurenine proportion and proton peaks observed at 3.0-5.0 ppm (amino-aromatics) in the1H NMR spectra may explain the differences in antioxidant activity of OVS and DGS.

Original languageEnglish
Article numbere56520
JournalFood Science and Technology
StatePublished - 2022

Bibliographical note

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© 2022, Sociedade Brasileira de Ciencia e Tecnologia de Alimentos, SBCTA. All rights reserved.


  • Antioxidant
  • Cephalopod skin
  • Chemical structure
  • Ommochrome pigments


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