Table 1 Effects of simulated digestion on monomeric phenolic in different varieties of lychee pericarp by HPLC–DAD

Caffeic acid

DW

0.10 ± 0.01^a

0.99 ± 0.04^c

0.24 ± 0.03^a

0.16 ± 0.07^a

0.21 ± 0.05^a

0.54 ± 0.17^b

SGF

0.07 ± 0.00^a,*

0.79 ± 0.03^e,*

0.25 ± 0.06^b

0.28 ± 0.01^b,*

0.50 ± 0.12^c,*

0.69 ± 0.02^d

SIF

ND^a,*

ND^a,*

ND*

ND^a,*

ND^a,*

ND^a,*

Ferulic acid

DW

0.35 ± 0.02^a

3.39 ± 0.18^e

0.83 ± 0.05^b

1.07 ± 0.33^b

1.42 ± 0.20^c

1.74 ± 0.03^d

SGF

0.25 ± 0.05^b,*

0.09 ± 0.06^a,*

0.38 ± 0.04^c,*

0.40 ± 0.08^ac,*

1.32 ± 0.07^d

ND^a,*

SIF

0.17 ± 0.07^a,*

0.87 ± 0.21^d,*

0.34 ± 0.06^b,*

0.06 ± 0.01^a,*

0.54 ± 0.05^c,*

0.59 ± 0.01^c,*

Procyanidin B2

DW

1.14 ± 0.19^a

9.42 ± 0.41^e

3.09 ± 0.28^c

2.49 ± 0.11^b

2.04 ± 0.49^b

5.56 ± 0.35^d

SGF

0.73 ± 0.10^a,*

7.05 ± 0.28^e,*

2.63 ± 0.31^c

2.14 ± 0.17^b,*

2.77 ± 0.02^c,*

6.19 ± 0.11^d,*

SIF

0.70 ± 0.03^a,*

1.47 ± 0.29^c,*

0.49 ± 0.02^a,*

0.48 ± 0.04^a,*

0.40 ± 0.04^a,*

1.14 ± 0.08^b,*

Epicatechin

DW

0.16 ± 0.07^a

4.48 ± 0.59^d

2.25 ± 0.04^b

1.81 ± 0.11^b

3.23 ± 0.31^c

4.50 ± 0.36^d

SGF

0.87 ± 0.13^a,*

3.60 ± 0.34^c

1.39 ± 0.28^a,*

1.39 ± 0.22^a,*

2.97 ± 0.49^b

3.85 ± 0.15^c,*

SIF

0.39 ± 0.05^a,*

2.19 ± 0.83^c,*

0.21 ± 0.00^a,*

0.06 ± 0.02^a,*

1.19 ± 0.36^b,*

1.98 ± 0.07^c,*

A-type procyanidin trimer

DW

1.10 ± 0.11^d

0.81 ± 0.07^c

0.07 ± 0.01^a

0.03 ± 0.00^a

0.38 ± 0.01^b

0.38 ± 0.16^b

SGF

ND^a,*

1.15 ± 0.23^b

0.16 ± 0.08^a,*

0.02 ± 0.00^a,*

0.05 ± 0.05^a,*

0.17 ± 0.08^a,*

SIF

0.15 ± 0.01^a,*

2.09 ± 0.40^b,*

ND^a

ND^a,*

ND^a,*

ND^a,*

Procyanidin A2

DW

1.50 ± 0.09^a

3.76 ± 0.08^d

1.36 ± 0.21^a

1.97 ± 0.08^b

1.32 ± 0.13^a

2.58 ± 0.18^c

SGF

1.01 ± 0.10^a,*

2.89 ± 0.80^cv

1.39 ± 0.02^a*

1.92 ± 0.21^ab

1.22 ± 0.18^a

2.52 ± 0.54^bc

SIF

0.94 ± 0.04^a*

2.22 ± 0.34^b*

0.87 ± 0.07^a

0.83 ± 0.00^a*

1.66 ± 0.28^a

1.91 ± 0.13^a

Quercetin-3-rutinose-7-rhamnoside

DW

0.26 ± 0.02^a

2.00 ± 0.06^c

0.64 ± 0.10^b

0.81 ± 0.09^b

0.40 ± 0.18^a

0.81 ± 0.14^b

SGF

0.29 ± 0.04^a

2.72 ± 0.14^e*

0.54 ± 0.05^b

0.82 ± 0.14^c

0.70 ± 0.03^bc*

1.36 ± 0.09^d

SIF

1.06 ± 0.00^b*

0.46 ± 0.13^a*

0.36 ± 0.08^a*

0.49 ± 0.03^a*

0.77 ± 0.01^b*

1.09 ± 0.02^b

Isoquercitrin

DW

0.32 ± 0.06^a

1.42 ± 0.09^d

0.35 ± 0.04^a

0.50 ± 0.04^b

0.41 ± 0.06^ab

0.71 ± 0.05^c

SGF

0.34 ± 0.04^a

1.30 ± 0.16^d

0.30 ± 0.06^a

0.57 ± 0.11^b

0.46 ± 0.08^ab

0.94 ± 0.09^c,*

SIF

ND^a,*

ND^a,*

ND^a,*

ND^a,*

ND^a,*

ND^a,*