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. 2019 Jun 11;17(6):349. doi: 10.3390/md17060349

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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ESI-MS/MS analysis of the carotenoid sulfates in E. flavus strain KJ5. Full Q1 scan (left) and product ion scans (right) spectra of nostoxanthin sulfate (A), caloxanthin sulfate (B), zeaxanthin sulfate (C), and erythroxanthin sulfate (D).