7908
Oxidized lipid products released by free radical reaction ( F ( 2 ) - isoprostanes and metabolites , F ( 3 ) - isoprostanes , neuroprostanes , 7 - ketocholesterol , 7 beta - hydroxycholesterol ) , by lipoxygenase enzymes ( 5 ( S ) - , 8 ( S ) - , 12 ( S ) - and 15 ( S ) - HETE , and resolvin D1 ) and by cytochrome P450 ( 9 ( S ) - , 11 ( S ) - and 20 - HETE , and 27 - hydroxycholestrol ) were measured in fish muscle using LC / MS / MS .
 isoprostanes, isoprostanes, neuroprostanes, 7 - ketocholesterol, 7 beta - hydroxycholesterol, 5 ( S ) - , 8 ( S ) - , 12 ( S ) - and 15 ( S ) - HETE, resolvin D1, 9 ( S ) - , 11 ( S ) - and 20 - HETE, 27 - hydroxycholestrol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 isoprostanes, isoprostanes, neuroprostanes, 7 - ketocholesterol, 7 beta - hydroxycholesterol, 5 ( S ) - , 8 ( S ) - , 12 ( S ) - and 15 ( S ) - HETE, resolvin D1, 9 ( S ) - , 11 ( S ) - and 20 - HETE, 27 - hydroxycholestrol