M/Z: 818.5196

Hit 4 annotations: Quinquenoside F1_[M-H2O+NH4]+; Ginsenoside A2_[M+NH4]+; PA(20:0/6 keto-PGF1alpha)_[M]+; PS(16:0/20:3(8Z,11Z,14Z)-2OH(5,6))_[M+H]+

在BioDeep NovoCell知识数据库中，参考离子总共被划分为4个级别。

Confirmed: 这个参考离子已经通过手动审计得到确认和验证。
Reliable: 这个参考离子可能在特定的解剖组织环境中高度保守。
Unreliable: 这个参考离子具有较高的排名价值，但缺乏可重复性。
Unavailable: 由于排名价值低且缺乏可重复性，这个参考离子不应用于注释。

Found 13 Reference Ions Near m/z 818.5196

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000006122 Reliable	818.5114	818.5112 ~ 818.5117 MzDiff: `2.1 ppm`	PE(18:3(6Z,9Z,12Z)/22:6(5Z,8E,10Z,13Z,15E,19Z)-2OH(7S, 17S)) (BioDeep_00000186570) Formula: C45H72NO10P (817.4894)	18.52 (82%)	Rattus norvegicus [UBERON:0004358] caput epididymis
MSI_000047375 Unreliable	818.5117	818.5117 ~ 818.5117 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	2.34 (100%)	Homo sapiens [UBERON:0013067] colorectal mucosa
MSI_000047407 Unreliable	818.5196	818.5196 ~ 818.5196 MzDiff: `none`	Quinquenoside F1 (BioDeep_00000024539) Formula: C42H74O15 (818.5027)	2.32 (100%)	Homo sapiens [UBERON:0013067] colorectal mucosa
MSI_000052533 Unreliable	818.5103	818.5103 ~ 818.5103 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	1.77 (100%)	Homo sapiens [UBERON:0001052] rectum
MSI_000052590 Unreliable	818.5163	818.5163 ~ 818.5163 MzDiff: `none`	Quinquenoside F1 (BioDeep_00000024539) Formula: C42H74O15 (818.5027)	1.45 (100%)	Homo sapiens [UBERON:0001052] rectum
MSI_000052629 Unreliable	818.5258	818.5258 ~ 818.5258 MzDiff: `none`	Not Annotated	1.04 (0%)	Homo sapiens [UBERON:0001052] rectum
MSI_000055612 Unreliable	818.5292	818.5291 ~ 818.5294 MzDiff: `1.5 ppm`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	1.95 (100%)	Homo sapiens [UBERON:0001043] esophagus
MSI_000021509 Unreliable	818.5101	818.5101 ~ 818.5101 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	0.87 (100%)	Mus musculus [UBERON:0001499] muscle of arm
MSI_000026707 Unreliable	818.5128	818.5128 ~ 818.5128 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	1.79 (100%)	Mus musculus [UBERON:0002048] lung
MSI_000026812 Unreliable	818.5139	818.5139 ~ 818.5139 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	1.79 (100%)	Mus musculus [UBERON:0002048] lung
MSI_000031020 Unreliable	818.523	818.523 ~ 818.523 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	0.26 (100%)	Macropus giganteus [UBERON:0003027] cingulate cortex
MSI_000031410 Unreliable	818.523	818.523 ~ 818.523 MzDiff: `none`	Ginsenoside A2 (BioDeep_00000000003) Formula: C42H72O14 (800.4922)	0.89 (100%)	Macropus giganteus [UBERON:0006093] precuneus cortex
MSI_000056143 Unavailable	818.51	818.51 ~ 818.51 MzDiff: `none`	PS(16:0/20:3(8Z,11Z,14Z)-2OH(5,6)) (BioDeep_00000206148) Formula: C42H76NO12P (817.5105)	-0.56 (100%)	Homo sapiens [UBERON:0007779] transudate

Found 10 Sample Hits

Metabolite	Species	Sample
Quinquenoside F1 Formula: C42H74O15 (818.5027) Adducts: [M-H2O+NH4]+ (Ppm: 12.1)	Mus musculus (Left upper arm)	357_l_total ion count Resolution: 50μm, 97x131 Description Diseased
Ginsenoside A2 Formula: C42H72O14 (800.4922) Adducts: [M+NH4]+ (Ppm: 14.8)	Mus musculus (Lung)	image5 Resolution: 40μm, 163x183 Description Supplementary Figure S8. MALDI-MSI data of mouse lung tissue administered with D9-choline and U 13C-DPPC–containing Poractant alfa surfactant (labels administered 18 h prior to sacrifice). Ion images of (a) m/z 796.6856 ([U13C-DPPC+Na]+), (b) m/z 756.5154 [PC32:0+Na]+ and (c) m/z 765.6079 ([D9-PC32:0+Na]+). (d) Overlay image of [U13C-DPPC+Na]+ (red) and [D9-PC32:0+Na]+ (green). Parts per million (ppm) mass errors are indicated in parentheses. All images were visualised using totalion-current normalisation and using hotspot removal (high quantile = 99%). DPPC = PC16:0/16:0.
Ginsenoside A2 Formula: C42H72O14 (800.4922) Adducts: [M+NH4]+ (Ppm: 3.7)	Macropus giganteus (Brain)	170321_kangaroobrain-dan3-pos_maxof50.0_med1 Resolution: 50μm, 81x50 Description Sample information Organism: Macropus giganteus (kangaroo) Organism part: Brain Condition: Wildtype Sample growth conditions: Wild
Quinquenoside F1 Formula: C42H74O15 (818.5027) Adducts: [M-H2O+NH4]+ (Ppm: 7.8)	Homo sapiens (colorectal adenocarcinoma)	80TopL, 50TopR, 70BottomL, 60BottomR-profile Resolution: 17μm, 137x136 Description The human colorectal adenocarcinoma sample was excised during a surgical operation performed at the Imperial College Healthcare NHS Trust. The sample and procedures were carried out in accordance with ethical approval (14/EE/0024).
PA(20:0/6 keto-PGF1alpha) Formula: C43H79O12P (818.5309) Adducts: [M]+ (Ppm: 14)	Homo sapiens (colorectal adenocarcinoma)	520TopL, 490TopR, 510BottomL, 500BottomR-profile Resolution: 17μm, 147x131 Description The human colorectal adenocarcinoma sample was excised during a surgical operation performed at the Imperial College Healthcare NHS Trust. The sample and procedures were carried out in accordance with ethical approval (14/EE/0024).
Quinquenoside F1 Formula: C42H74O15 (818.5027) Adducts: [M-H2O+NH4]+ (Ppm: 11.9)	Homo sapiens (colorectal adenocarcinoma)	439TopL, 409TopR, 429BottomL, 419BottomR-profile Resolution: 17μm, 157x136 Description The human colorectal adenocarcinoma sample was excised during a surgical operation performed at the Imperial College Healthcare NHS Trust. The sample and procedures were carried out in accordance with ethical approval (14/EE/0024).
Ginsenoside A2 Formula: C42H72O14 (800.4922) Adducts: [M+NH4]+ (Ppm: 5.6)	Homo sapiens (NA)	160TopL,130TopR,150BottomL,140BottomR-profile Resolution: 17μm, 142x136 Description
PS(16:0/20:3(8Z,11Z,14Z)-2OH(5,6)) Formula: C42H76NO12P (817.5105) Adducts: [M+H]+ (Ppm: 1.6)	Homo sapiens (esophagus)	LNTO30_17_2 Resolution: 75μm, 82x54 Description
Quinquenoside F1 Formula: C42H74O15 (818.5027) Adducts: [M-H2O+NH4]+ (Ppm: 7.8)	Homo sapiens (esophagus)	LNTO22_1_8 Resolution: 75μm, 69x61 Description
Ginsenoside A2 Formula: C42H72O14 (800.4922) Adducts: [M+NH4]+ (Ppm: 3.2)	Homo sapiens (esophagus)	LNTO26_16_1 Resolution: 75μm, 95x88 Description