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Table 2 Peak assignments of brown algae phenolic compounds detected in STPE

From: Photoprotective effects of Sargassum thunbergii on ultraviolet B-induced mouse L929 fibroblasts and zebrafish

No.

RT (min)

Compond

Formula

Class

[M-H]− m/z

1

2.27

protocatechuic acid

C7H6O4

Benzene and substituted derivatives

153.01883

2

2.55

difucol

C12H10O6

Benzene and substituted derivatives

249.04079

3

2.99

gallic acid

C7H6O5

Benzene and substituted derivatives

169.01376

4

7.87

4-hydroxybenzoic

C7H6O3

Benzene and substituted derivatives

137.02383

5

1.43

p-Coumaric acid

C9H8O3

Cinnamic acids and derivatives

163.0396

6

5.60

Isoquercitrin

C21H20O12

Flavonoids

463.08957

7

6.07

quercitrin

C21H20O11

Flavonoids

447.09467

8

6.42

isorhamnetin

C16H12O7

Flavonoids

315.05206

9

9.24

catechin

C15H14O6

Flavonoids

289.07248

10

1.62

bifuhalol

C12H10O7

Tannins

265.03595

11

4.81

pentafuhalol A

C30H22O17

Tannins

653.08099

12

5.01

7-hydroxyeckol

C18H12O10

Tannins

387.03696

13

5.48

deshydroxypentafuhalol

C30H22O16

Tannins

637.08289

14

6.33

trifuhalolA

C18H14O10

Tannins

389.05243