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. 2019 Nov 29;8(12):600. doi: 10.3390/antiox8120600

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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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Chlorophyll structures identified in Scenedesmus obliquus: (a) chlorophyll (R³ is phytol, C₂₀H₄₀) and chlorophyllide (R³ is H) structure, R¹ is CH₃ for chlorophyll a, and CHO for chlorophyll b, R² is H for chlorophyll (a and b) and OH for 13²-hydroxy-chlorophyll (a and b); (b) pheophytin (R³ is phytol, C₂₀H₄₀) and pheophorbide (R³ is H) structure, R² is H for pheophorbide, and OH for 13²-hydroxy-pheophorbide; (c) 15²-hydroxy-lactone chlorophyll b structure.