Table 5 Phenolic compounds present in the guava pomace extract identified by GC-MS

1

Phosphoric acid, tristrimethylsilyl

5.789

2.39

299 (100), 73 (47), 300 (24), 314 (17), 301 (13); 341 (M+)

2

Beta-caryophyllene

6.978

0.65

41 (100), 93 (93), 133 (87), 91 (85), 69 (83); 189 (M+)

3

Malic acid (TMS)

7.219

0.73

73 (100), 147 (54), 233 (24), 245 (14), 133 (12); 335 (M+)

4

Alpha-selinene

7.460

0.59

93 (100), 107 (86), 189 (85), 91 (81), 41 (78), 205 (M+)

5

Trimethylsilyl 3-phenyl-2-propenoate

7.630

1.58

205 (100), 131 (87), 103 (67), 161 (62), 77 (48); 221 (M+)

11

Isovanilic acid

8.87

0.67

73 (100), 297 (67), 267 (48), 217 (42), 312 (40), 357 (M+)

16

Tris (trimethylsilyl) 2-[(trimethylsilyl)oxy]-1,2,3-propanetricarboxylate

9.176

3.69

73 (100), 273 (74), 147 (51), 217 (19), 347 (19); 467 (M+)

18

Beta-l-mannofuranose, 6-deoxy-1,2,3,5-tetrakis-o-(trimethylsilyl)

9.314

1.78

73 (100), 217 (96), 204 (42), 191 (23), 147 (22); 347 (M+)

19

Glucofuranoside, methyl 2,3,5,6-tetrakis-o-(trimethylsilyl)-, alpha-d-

9.353

2.79

217 (100), 73 (99), 218 (49), 129 (48), 191 (23); 363 (M+)

25

Gallic acid

9.89

3.72

73 (100), 281 (62), 458 (38), 332 (30), 147 (26); 464 (M+)

27

Hexadecanoic acid, trimethylsilyl ester

10.311

2.86

117 (100), 73 (79), 313 (74), 75 (58), 132 (52), 329 (M+)

31

Oleic acid, trimethylsilyl ester

11.425

1.51

73 (100), 117 (97), 75 (76), 129 (64), 339 (59), 354 (M+)

38

Epicatechin

17.41

0.61

368 (100), 73 (56), 355 (46), 369 (34), 650 (23), 654 (M+)

40

Myricetin

20.511

1.68

735 (100), 736 (66), 737 (39), 73 (36), 575 (33), 740 (M+)

41

Quercetin

20.601

4.94

647 (100), 648 (55), 649 (35), 73 (26), 650 (12), 663 (M+)