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Table 2 Names and structures of the most common unsaturated fatty acids (Hu et al. 2008; Rodolfi et al. 2009)

From: Integration of biology, ecology and engineering for sustainable algal-based biofuel and bioproduct biorefinery

Symbol Common name Systematic name Structure Mp. (°C)
16:1D9 Palmitoleic acid Hexadecenoic acid CH3(CH2)5CH=CH–(CH2)7COOH − 0.5
18:1D9 Oleic acid 9-Octadecenoic acid CH3(CH2)7CH=CH–(CH2)7COOH 13.4
18:2D9,12 Linoleic acid 9,12-Octadecadienoic acid CH3(CH2)4(CH=CHCH2)2(CH2)6COOH − 9.0
18:3D9,12,15 α-Linolenic acid 9,12,15-Octadecatrienoic acid CH3CH2(CH=CHCH2)3(CH2)6COOH − 17.0
20:4D5,8,11,14 Arachidonic acid 5,8,11,14-Eicosatetraenoic acid CH3(CH2)4(CH=CHCH2)4(CH2)2COOH − 49.0
20:5D5,8,11,14,17 EPA 5,8,11,14,17-Eicosapentaenoic-acid CH3CH2(CH=CHCH2)5(CH2)2COOH − 54.0
22:6 D4,7,10,13,16,19 DHA Docosahexaenoic acid 22:6(n-3)  
  1. Mp. melting point temperature