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Table 6 1H nuclear magnetic resonance (NMR) data of colorectal cancer (CRC) biomarker pool (sample A) and their methyl esters

From: Reduced levels of hydroxylated, polyunsaturated ultra long-chain fatty acids in the serum of colorectal cancer patients: implications for early screening and detection

Types of protons CRC biomarker pool Methyl esters of CRC biomarker pool
CH 3 0.83-0.90 0.83-0.90
CH 2 1.21-1.24, m 1.21-1.24, m
-CH 2CH2COOH 1.57-1.65, m 1.53-1.69, m
-CH 2CH=CH- 1.98-2.08, m 1.94-2.03, m
CH 2COO 2.23-2.28, m 2.23-2.31, m
-CH=CH-CH 2-CH= 2.75-2.79, m 2.74-2.82, m
OCH 3 - 3.64, s
-CH(OH)CH= 3.45-3.71, 4.03-4.26 4.02-4.12, 4.16-4.26, 4.58-4.60
-CH= 5.10-5.47, m 5.08-5.40, m
-CH(OH)CH= 5.76-5.91, m 5.75-5.90, m
  1. *NMR solvent is CDCl3, signals assigned using 2D NMR experiments (HMQC and HMBC)