<Tr> <Td> Linoelaidic acid </Td> <Td> CH (CH) CH = CHCH CH = CH (CH) COOH </Td> <Td> trans, trans - Δ, Δ </Td> <Td> 18: 2 </Td> <Td> n − 6 </Td> </Tr> <Tr> <Td> α - Linolenic acid </Td> <Td> CH CH CH = CHCH CH = CHCH CH = CH (CH) COOH </Td> <Td> cis, cis, cis - Δ, Δ, Δ </Td> <Td> 18: 3 </Td> <Td> n − 3 </Td> </Tr> <Tr> <Td> Arachidonic acid </Td> <Td> CH (CH) CH = CHCH CH = CHCH CH = CHCH CH = CH (CH) COOH </Td> <Td> cis, cis, cis, cis - Δ Δ, Δ, Δ </Td> <Td> 20: 4 </Td> <Td> n − 6 </Td> </Tr> <Tr> <Td> Eicosapentaenoic acid </Td> <Td> CH CH CH = CHCH CH = CHCH CH = CHCH CH = CHCH CH = CH (CH) COOH </Td> <Td> cis, cis, cis, cis, cis - Δ, Δ, Δ, Δ, Δ </Td> <Td> 20: 5 </Td> <Td> n − 3 </Td> </Tr>

Where are most plasma free fatty acids obtained from