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

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