Table 2. MS results of metabolites identified in dried lavers

Classes No. tR (min)1) Fragment ions (positive, m/z) Molecular formula (MW)2) Metabolites3) MSI levels4)
Amino acids 1 0.68 126.0230([M+H]+), 108.0121 C2H7NO3S (125) Taurine 1
2 0.68 104.1080([M]+), 60.0812 C5H14NO (104) Choline 1
3 0.69 134.0458([M+H]+), 116.0351, 88.0401, 74.0241 C4H7NO4 (133) Aspartic acid 1
4 0.70 90.0557([M+H]+), 44.0488 C3H7NO2 (89) Alanine 1
6 0.73 148.0614([M+H]+), 130.0508, 102.0557, 84.0452 C5H9NO4 (147) Glutamic acid 1
7 0.75 176.1039([M+H]+), 159.0772, 113.0713 C6H13N3O3 (175) Citrulline 1
10 0.86 146.1185([M+H]+), 87.0448, 60.0808, 58.0656 C7H15NO2 (145) Acetylcholine 1
21 2.46 182.0819([M+H]+), 165.0553, 136.0764 C9H11NO3 (181) Tyrosine 1
14 1.17 174.0771([M+H]+), 128.0715, 82.0658, 55.0547 C7H11NO4 (173) 2,6-Piperidinedicarboxylic acid 2
30 4.56 205.0981([M+H]+), 188.0716, 146.0609, 118.0658 C11H12N2O2 (204) Tryptophan 1
Mycosporine-like amino acids 11 0.86 245.1140([M+H]+), 230.0962, 227.1035, 209.0927, 186.1012 C10H16N2O5 (244) Palythine 2
12 0.86 333.1304([M+H]+), 318.1062, 303.1194, 274.1173, 230.1271, 212.1150, 186.1012 C13H20N2O8 (332) Shinorine 1
15 1.25 289.1400([M+H]+), 274.1161, 230.1272, 212.1168, 186.1004 C12H20N2O6 (288) Asterina-330 2
20 1.98 347.1457([M+H]+), 332.1229, 303.1196, 288.1314, 244.1430, 200.1165, 186.1011 C14H22N2O8 (346) Porphyra-334 1
22 2.91 317.1351([M+H]+), 302.1118, 258.1197, 214.1325 C13H20N2O7 (316) Mycosporine-glycine-alanine 2
24 3.20 273.1445([M+H]+), 258.1216, 214.1308 C12H20N2O5 (272) Aplysiapalythine B 2
28 4.10 285.1450([M+H]+), 270.1215, 241.0829, 226.1317, 197.0930 C13H20N2O5 (284) Usujirene 2
Nucleic acid related compounds 13 1.06 324.0605([M+H]+), 112.0508 C9H14N3O8P (323) 5’-CMP 1
16 1.35 325.0435([M+H]+), 97.0293 C9H13N2O9P (324) 5’-UMP 1
18 1.79 349.0546([M+H]+), 137.0468 C10H13N4O8P (348) 5’-IMP 1
19 1.97 364.0655([M+H]+), 152.0581 C10H14N5O8P (363) 5’-GMP 1
23 2.94 267.0594([M+Na]+), 113.0349 C9H12N2O6 (244) Uridine 1
25 3.86 268.1047([M+H]+), 136.0632 C10H13N5O4 (267) Adenosine 1
26 3.88 284.0985([M+H]+), 152.0562 C10H13N5O5 (283) Guanosine 1
27 3.89 291.0709([M+Na]+), 137.0469 C10H12N4O5 (268) Inosine 1
29 4.52 298.0977([M+H]+), 136.0626 C11H15N5O3S (297) 5’-Methylthioadenosine 2
Organic acids 17 1.76 215.0172([M+Na]+) C6H8O7 (192) Citric acid 1
Phospholipids 32 9.54 516.3093([M+H]+), 184.0741, 104.1077 C26H46NO7P (515) LPC 18:4 2
33 9.80 468.3074([M+H]+), 450.2951, 184.0745, 104.1079 C22H48NO7P (467) LPC 14:0 2
34 9.94 500.2775([M+H]+), 359.2579 C25H42NO7P (499) LPE 20:5 2
35 9.99 542.3242([M+H]+), 524.3139, 258.1109, 240.0999, 184.0746, 104.1081 C28H48NO7P (541) LPC 20:5 2
36 10.05 518.3240([M+H]+), 500.3124, 258.1104, 240.1000, 184.0742, 104.1078 C26H50NO7P (517) LPC 18:3 2
37 10.43 478.2934([M+H]+), 337.2733 C23H44NO7P (477) LPE 18:2 2
38 10.46 502.2930([M+H]+), 361.2742 C25H44NO7P (501) LPE 20:4 2
39 10.49 520.3401([M+H]+), 502.3302, 258.1119, 240.1003, 184.0746, 104.1081 C26H50NO7P (519) LPC 18:2 2
40 10.51 544.3406([M+H]+), 526.3295, 258.1118, 240.1002, 184.0745, 104.1080 C28H50NO7P (543) LPC 20:4 2
41 10.54 452.2770([M+H]+), 311.2576 C21H42NO7P (451) LPE 16:1 2
42 10.61 494.3245([M+H]+), 476.3133, 184.0743, 104.1078 C22H46NO7P (493) LPC 16:1 2
44 10.79 454.2924([M+H]+), 313.2760 C21H44NO7P (453) LPE 16:0 1
45 10.83 504.3085([M+H]+), 363.2905 C25H46NO7P (503) LPE 20:3 2
46 10.87 496.3395([M+H]+), 478.3294, 258.1115, 240.1004, 184.0745, 104.1080 C24H50NO7P (495) LPC 16:0 1
47 10.90 546.3557[M+H]+), 528.3472, 184.0744, 104.1079 C28H50NO7P (545) LPC 20:3 2
48 11.11 480.3084([M+H]+), 339.2912 C23H46NO7P (479) LPE 18:1 2
49 11.19 522.3559([M+H]+), 504.3427, 258.1104, 184.0741, 104.1077 C26H52NO7P (521) LPC 18:1 2
51 12.05 524.3704([M+H]+), 184.0742, 104.1079 C26H54NO7P (523) LPC 18:0 2
52 12.28 550.3872([M+H]+), 184.0748, 104.1078 C28H56NO7P (549) LPC 20:1 2
Glycolipids 43 10.72 677.3721([M+Na]+), 515.3207 C31H58O14 (654) DGMG 16:0 2
Betaine lipids 50 11.34 474.3788([M+H]+), 236.1500 C26H51NO6 (473) MGTS 16:0 2
Fatty acids 53 12.59 303.2331([M+H]+), 119.0861, 105.0709, 91.0555 C20H30O2 (302) Eicosapentaenoic acid 2
Others 5 0.72 258.1110([M+H]+), 184.0741, 125.0007, 104.1080, 86.0972, 60.0811 C8H20NO6P (257) Glycerophosphocholine 2
8 0.80 247.0587([M+H]+), 173.0219 C6H15O8P (246) Glycerophosphoglycerol 2
9 0.84 277.0901([M+Na]+), 163.0612, 93.0554 C9H18O8 (254) Galactosylglycerol 1
31 7.42 587.2862([M+H]+), 464.2167, 450.2014 C33H38N4O6 (586) Phycoerythrobilin 2
tR, retention time.
MW, molecular weight.
5’-CMP, cytidine 5’-monophosphate; 5’-UMP, uridine 5’-monophosphate; 5’-IMP, inosine 5’-monophosphate; 5’-GMP, guanosine 5’-monophosphate; LPC, lysophosphatidylcholine; LPE, lysophosphatidylethanolamine; DGMG, digalactosylmonoacylglycerol; MGTS, monoacylglycerol-trimethylhomoserine;
Level 1, identified compounds (confirmed with standards); Level 2, putatively annotated compounds (matched with spectral databases).