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. 2022 Apr 18;20(4):269. doi: 10.3390/md20040269

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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LC-MS/MS analysis of prodiginine derivatives in H. chejuensis NBU794. (A) The nine UV peaks corresponding prodiginine derivatives were marked with arabic numbers, and the UV−Vis spectra of nine eluent peaks are listed on the right. (B) The MS/MS spectrums are listed on the left and compound structures with fragment information are listed on the right. Peak #1: 2-methyl-3-propyl-prodiginine; Peak #4: 2-methyl-3-hexyl-prodiginine; Peak #5: 2-methyl-3-octyl-prodiginine; Peak #6: Undecylprodiginine; Peak #7: prodigiosin; Peak #8: 2-methyl-3-butyl-prodiginine; Peak #9: 2-methyl-3-heptyl-prodiginine.