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Table 4 Priors \(P_{\text{frag-comm}}(f)\) for common fragments f

From: Fragmentation trees reloaded

Molecular formula

Ion mass

Total intensity

Total count

\(P_{\text{frag-comm}}\)

Protonated

Neutral

GNPS

Agilent

GNPS

Agilent

C3H6N+

C3H5N

56.0495

0.00

93.63

0

392

2.40

C3H8N+

C3H7N

58.0651

0.67

100.53

4

323

2.59

\(\hbox {C}_{5}\hbox {H}_{5}^{+}\)

C5H4

65.0386

0.00

83.35

0

530

2.14

\(\hbox {C}_{4}\hbox {H}_{8}\hbox {N}^{+}\)

\(\hbox {C}_{4}\hbox {H}_{7}\hbox {N}\)

70.0651

7.38

56.00

8

313

1.62

\(\hbox {C}_{4}\hbox {H}_{10}\hbox {N}^{+}\)

\(\hbox {C}_{4}\hbox {H}_{9}\hbox {N}\)

72.0808

0.00

72.92

0

179

1.87

\(\hbox {C}_{6}\hbox {H}5^{+}\)

\(\hbox {C}_{6}\hbox {H}_4\)

77.0386

1.00

139.35

3

720

3.60

\(\hbox {C}_{6}\hbox {H}_{7}^{+}\)

\(\hbox {C}_{6}\hbox {H}_{6}\)

79.0542

0.52

69.85

3

514

1.80

\(\hbox {C}_{5}\hbox {H}_{12}\hbox {N}^{+}\)

\(\hbox {C}_{5}\hbox {H}_{11}\hbox {N}\)

86.0964

0.92

71.08

5

128

1.85

\(\hbox {C}_{7}\hbox {H}_{7}^{+}\)

\(\hbox {C}_{7}\hbox {H}_{6}\)

91.0542

60.61

252.97

300

720

8.04

\(\hbox {C}_{6}\hbox {H}_{6}\hbox {N}^{+}\)

\(\hbox {C}_{6}\hbox {H}_{5}\hbox {N}\)

92.0495

3.92

76.12

31

185

2.05

\(\hbox {C}_{6}\hbox {H}_{9}\hbox {O}^{+}\)

\(\hbox {C}_{6}\hbox {H}_{8}\hbox {O}\)

97.0648

10.95

58.00

37

86

1.77

\(\hbox {C}_{6}\hbox {H}_{12}\hbox {N}^{+}\)

\(\hbox {C}_{6}\hbox {H}_{11}\hbox {N}\)

98.0964

8.73

74.93

66

139

2.14

\(\hbox {C}_{8}\hbox {H}_{7}^{+}\)

\(\hbox {C}_{8}\hbox {H}_{6}\)

103.0542

64.49

34.61

562

241

2.54

\(\hbox {C}_{7}\hbox {H}_{5}\hbox {O}^{+}\)

\(\hbox {C}_{7}\hbox {H}_{4}\hbox {O}\)

105.0335

50.43

47.64

178

100

2.51

\(\hbox {C}_{8}\hbox {H}_{9}^{+}\)

\(\hbox {C}_{8}\hbox {H}_{8}\)

105.0699

108.25

104.51

580

352

5.45

\(\hbox {C}_{7}\hbox {H}_{7}\hbox {O}^{+}\)

\(\hbox {C}_{7}\hbox {H}_{6}\hbox {O}\)

107.0491

62.41

53.68

320

187

2.98

\(\hbox {C}_{8}\hbox {H}_{11}^{+}\)

\(\hbox {C}_{8}\hbox {H}_{10}\)

107.0855

35.23

29.89

171

120

1.67

\(\hbox {C}_{6}\hbox {H}_{6}\hbox {NO}^{+}\)

\(\hbox {C}_{6}\hbox {H}_{5}\hbox {NO}\)

108.0444

23.05

48.66

64

76

1.84

\(\hbox {C}_{7}\hbox {H}_{9}\hbox {O}^{+}\)

\(\hbox {C}_{7}\hbox {H}_{8}\hbox {O}\)

109.0648

37.15

53.40

161

107

2.32

\(\hbox {C}_{9}\hbox {H}_{7}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{6}\)

115.0542

73.68

43.35

618

262

3.00

\(\hbox {C}_{9}\hbox {H}_{9}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{8}\)

117.0699

61.67

46.66

371

206

2.78

\(\hbox {C}_{9}\hbox {H}_{11}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{10}\)

119.0855

51.94

40.94

265

190

2.38

\(\hbox {C}_{8}\hbox {H}_{9}\hbox {O}^{+}\)

\(\hbox {C}_{8}\hbox {H}_{8}\hbox {O}\)

121.0648

125.09

72.05

394

201

5.05

\(\hbox {C}_{10}\hbox {H}_{8}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{7}\)

128.0621

51.79

13.98

305

98

1.69

\(\hbox {C}_{10}\hbox {H}_{9}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{8}\)

129.0699

60.60

24.99

425

163

2.19

\(\hbox {C}_{9}\hbox {H}_{8}\hbox {N}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{7}\hbox {N}\)

130.0651

75.54

31.39

343

159

2.74

\(\hbox {C}_{10}\hbox {H}_{11}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{10}\)

131.0855

61.12

34.37

277

144

2.45

\(\hbox {C}_{9}\hbox {H}_{10}\hbox {N}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{9}\hbox {N}\)

132.0808

58.68

21.70

216

99

2.06

\(\hbox {C}_{8}\hbox {H}_{7}\hbox {O}_{2}^{+}\)

\(\hbox {C}_{8}\hbox {H}_{6}\hbox {O}_2\)

135.0441

40.37

22.03

176

53

1.60

\(\hbox {C}_{9}\hbox {H}_{11}\hbox {O}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{10}\hbox {O}\)

135.0804

42.95

32.87

221

121

1.94

\(\hbox {C}_{11}\hbox {H}_{11}^{+}\)

\(\hbox {C}_{11}\hbox {H}_{10}\)

143.0855

54.61

23.88

288

118

2.01

\(\hbox {C}_{10}\hbox {H}_{10}\hbox {N}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{9}\hbox {N}\)

144.0808

61.59

20.67

220

99

2.11

\(\hbox {C}_{11}\hbox {H}_{13}^{+}\)

\(\hbox {C}_{11}\hbox {H}_{12}\)

145.1012

57.60

28.15

219

110

2.20

\(\hbox {C}_{9}\hbox {H}_{8}\hbox {NO}^{+}\)

\(\hbox {C}_{9}\hbox {H}_{7}\hbox {NO}\)

146.0600

62.09

7.40

242

52

1.78

\(\hbox {C}_{10}\hbox {H}_{11}\hbox {O}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{10}\hbox {O}\)

147.0804

67.16

33.97

247

107

2.59

\(\hbox {C}_{11}\hbox {H}_{11}\hbox {O}^{+}\)

\(\hbox {C}_{11}\hbox {H}_{10}\hbox {O}\)

159.0804

47.36

17.07

230

84

1.65

\(\hbox {C}_{10}\hbox {H}_{10}\hbox {NO}^{+}\)

\(\hbox {C}_{10}\hbox {H}_{9}\hbox {NO}\)

160.0757

58.53

18.10

221

40

1.96

\(\hbox {C}_{13}\hbox {H}_{9}^{+}\)

\(\hbox {C}_{13}\hbox {H}_{8}\)

165.0699

54.17

36.32

255

163

2.32

\(\hbox {C}_{13}\hbox {H}_{11}^{+}\)

\(\hbox {C}_{13}\hbox {H}_{10}\)

167.0855

28.57

36.85

123

65

1.68

\(\hbox {C}_{12}\hbox {H}_{11}\hbox {O}^{+}\)

\(\hbox {C}_{12}\hbox {H}_{10}\hbox {O}\)

171.0804

44.97

28.37

164

62

1.88

  1. Entry “ion mass” is the exact theoretical mass of the protonated fragment. Entries “GNPS/Agilent” indicate total sum of the peak intensities and total peak count of the fragment in the two datasets. Note that a particular fragment can be very common, yet have relatively small sum of peak intensities, because fragments peaks are consistently of small intensity