Table 1. MS results of metabolites identified in dried lavers

Classes No. tR (min)1) Fragment ions (positive, m/z) Molecular formula (MW)2) Predicted compound Reference3)
Amino acids 1 0.68 126.0229([M+H]+), 108.0123 C2H7NO3S (125) Taurine 1
3 0.69 134.0459([M+H]+), 116.0351, 88.0402, 74.0243 C4H7NO4 (133) Aspartic acid 1
4 0.70 90.0558([M+H]+), 44.0489 C3H7NO2 (89) Alanine 1
6 0.73 148.0615([M+H]+), 130.0509, 102.0558, 84.0451 C5H9NO4 (147) Glutamic acid 1
Mycosporine-like amino acids 10 0.85 333.1300([M+H]+), 318.1060, 303.1192, 274.1171, 230.1272, 212.1149, 186.1012 C13H20N2O8 (332) Shinorine 3
14 1.27 289.1397([M+H]+), 274.1162, 230.1274, 212.1169, 186.1003 C12H20N2O6 (288) Asterina-330 7
19 1.89 347.1458([M+H]+), 332.1228, 303.1197, 288.1316, 244.1429, 200.1164, 186.1007 C14H22N2O8 (346) Porphyra-334 3
20 2.79 317.1353([M+H]+), 302.1119, 258.1199, 214.1326 C13H20N2O7 (316) Mycosporine-glycine-alanine 4
22 3.21 273.1449([M+H]+), 258.1217, 214.1310 C12H20N2O5 (272) Aplysiapalythine B 4
26 4.08 285.1451([M+H]+), 270.1216, 241.0828, 226.1319, 197.0931 C13H20N2O5 (284) Usujirene 4
Nucleic acids 11 1.04 324.0588([M+H]+), 112.0509 C9H14N3O8P (323) 5’-CMP 1
13 1.20 325.0443([M+H]+), 97.0294 C9H13N2O9P (324) 5’-UMP 1
15 1.46 244.0930([M+H]+), 112.0518 C9H13N3O5 (243) Cytidine 1
17 1.72 349.0548([M+H]+), 137.0465 C10H13N4O8P (348) 5’-IMP 1
18 1.80 364.0650([M+H]+), 152.0583 C10H14N5O8P (363) 5’-GMP 1
21 2.79 267.0604([M+Na]+), 113.0347 C9H12N2O6 (244) Uridine 1
23 3.82 268.1048([M+H]+), 136.0628, 119.0360 C10H13N5O4 (267) Adenosine 1
24 3.83 284.09985([M+H]+), 152.0579 C10H13N5O5 (283) Guanosine 1
25 3.83 291.0765([M+Na]+), 137.0472 C10H12N4O5 (268) Inosine 1
Lysophospholipids 28 8.55 468.3084([M+H]+), 450.2981, 258.1102, 184.0735, 104.1076 C22H46NO7P (467) LPC 14:04) 2
29 8.63 500.2779([M+H]+), 359.2575 C25H42NO7P (499) LPE 20:55) 2
30 8.72 542.3242([M+H]+), 524.3139, 258.1109, 240.0999, 184.0746, 104.1081 C28H48NO7P (541) LPC 20:5 2
31 8.80 518.3239([M+H]+), 500.3124, 258.1104, 240.1000, 184.0742, 104.1078 C26H50NO7P (517) LPC 18:3 2
32 9.24 478.2934([M+H]+), 337.2732 C23H44NO7P (477) LPE 18:2 2
33 9.27 502.2929([M+H]+), 361.2746 C25H44NO7P (501) LPE 20:4 2
34 9.39 520.3404([M+H]+), 502.3287, 258.1090, 240.1009, 184.0741, 104.1079 C26H50NO7P (519) LPC 18:2 2
35 9.41 544.3409([M+H]+), 526.3295, 258.11, 240.10, 184.07, 104.10 C28H50NO7P (543) LPC 20:4 2
36 9.41 452.28([M+H]+), 311.26 C21H42NO7P (451) LPE 16:1 2
37 9.58 494.32([M+H]+), 476.31, 258.11, 240.1003, 184.0746, 104.1081 C22H46NO7P (493) LPC 16:1 2
38 9.77 454.2927([M+H]+), 313.2735 C21H44NO7P (453) LPE 16:0 2
39 9.83 504.3088([M+H]+), 363.2903 C25H46NO7P (503) LPE 20:3 2
40 9.98 496.3405([M+H]+), 478.3294, 258.1119, 240.10, 184.07, 104.10 C24H50NO7P (495) LPC 16:0 2
41 10.01 546.36[M+H]+), 528.34, 258.1115, 240.1004, 184.0745, 104.1080 C28H50NO7P (545) LPC 20:3 2
42 10.28 480.3085([M+H]+), 339.2911 C23H46NO7P (479) LPE 18:1 2
43 10.47 522.3560([M+H]+), 504.3444, 258.1104, 184.0741, 104.1077 C26H52NO7P (521) LPC 18:1 2
44 11.09 548.3713([M+H]+), 184.0744, 104.1082 C28H54NO7P (547) LPC 20:2 2
45 12.15 524.3716([M+H]+), 184.0738, 104.1078 C26H54NO7P (523) LPC 18:0 2
46 12.53 550.3868([M+H]+), 184.0741, 104.1078 C28H56NO7P (549) LPC 20:1 2
Others 2 0.68 104.1079([M]+), 60.0811, 58.0652 C5H14NO (104) Choline 1
5 0.72 258.1108([M+H]+), 184.0741, 125.0007, 104.1080, 86.0972, 60.0811 C8H20NO6P (257) Glycerophosphocholine 1
7 0.73 247.0585([M+H]+), 173.0219 C6H15O8P (246) Glycerophosphoglycerol 2
8 0.84 277.0900([M+Na]+), 163.0611, 93.0554 C9H18O8 (254) 3-β-D-Galactosyl-sn-glycerol 3
9 0.84 146.1184([M]+), 87.0450, 60.0811 C7H16NO2 (145) Acetylcholine 1
12 1.17 174.0772([M+H]+), 128.0716, 82.0659, 55.0546 C7H11NO4 (173) 2,6-Piperidinedicarboxylicacid 6
16 1.69 215.0172([M+Na]+), 147.0311 C6H8O7 (192) Citric acid 1
27 6.87 587.2882([M+H]+), 464.2175, 450.2021 C33H38N4O6 (586) Phycoerythrobilin 5
tR, retention time.
MW, molecular weight.
Metabolites were identified by (1), massbank; (2), lipid maps; (3), standards; (4), Geraldes and Pinto (2021); (5), Kamio et al. (2010); (6), Kawauchi et al. (1978); (7), Torres et al. (2018).
LPC, lysophosphatidylcholine.
LPE, lysophosphatidylehthanolamine.