Table 1 in Visualizing the spatial distribution of metabolites in Clausena lansium (Lour.) skeels using matrix-assisted laser desorption / ionization mass spectrometry imaging

Table 1 Identification of metabolites in Clausena lansium (Lour.) Skeels by MALDI-MS analysis in positive ion mode.
Compound nameIon formulam/zFragment ionRef.AlkaloidsDL-Stachydrine a[C H NO +K]+ 7 13 2182.06100.11[C H N O –CO +H]+ 14 26 2 4 2243.21100.11, 144.10[C H N O +K]+ 14 26 2 4325.15182.06, 144.10, 100.113-Methylcarbazole b[C H N H]+ 13 11 +182.1095.05, 167.07, 116.97, 105.05(Cui et al., 2002)Murrayanine b[C H NO H]+ 14 11 2+226.09198.09,183.07,167.07,155.07(Sripisut et al., 2012)Heptaphylline b[C H NO H]+ 17 17 +252.14234.13, 133.09, 91.05(Songsiang et al., 2011)5-methyl-2-vinyl-3,11-dihydropyrano carbazole c[C H NO H]+ 18 15 +262.12205.10, 234.13, 91.05Girinimbine a[C H NO + H]+ 18 17264.14131.05, 103.05, 205.10,Murrastinine b[C H NO +H]+ 18 17 2280.13174.09, 205.10, 262.12(Liu et al., 2019)Unknown[C H NO +K]+ 30 37 11626.20103.05, 131.05, 264.14, 500.16, 524.16Unknown[C H NO K]+ 28 40 15+668.19103.05, 131.05, 264.14, 282.15Coumarin8-Hydroxylpsoralen[C H O H]+ 11 6 4+203.03147.04,175.04, 131.05(Huang et al., 2017)Wampetin b[C H O H]+ 21 18 6+367.12203.03, 147.04, 131.05, 165.09(Liu et al., 2014)2′,3′-Epoxyindicolactone b[C H O +H]+ 21 18 7383.11203.03, 163.08, 181.09(Lakshmi et al., 1984)Anisolactone b[C H O +K]+ 21 18 6405.07–(Liu et al., 2014)Dihydroindicolactone b[C H O K]+ 21 20 6+407.09203.03, 147.04, 167.11, 369.13(Liu et al., 2014)Wampetin dimer c[C H O K]+ 42 36 12 +771.18405.07Other metabolitesSucrose[C H O K]+ 12 22 11+381.08219.03, 201.02Hexose[C H O +K]+ 6 12 6219.03–Citric acid[C H O +K]+ 6 8 7231.00–4-Methylmethamphetamine[C H N + H]+ 11 17164.14–
a Confirmed by standard substance.
b The mass fragments used to infer the chemical identities of the various compounds are based on published literature provided for each of the alkaloids in the supplementary information.
c Hypothesis.