M/Z: 816.4769

Hit 3 annotations: alpha-Chaconine_[M+H-2H2O]+; Porphyrin a_[M+NH4]+; PGP(16:1(9Z)/16:1(9Z))_[M+NH4]+

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 2 Reference Ions Near m/z 816.4769

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000065645 Unreliable	816.4722	816.4722 ~ 816.4722 MzDiff: `none`	PGP(16:1(9Z)/16:1(9Z)) (BioDeep_00000032986) Formula: C38H72O13P2 (798.4448)	1.68 (100%)	Homo sapiens [UBERON:0001155] colon
MSI_000010199 Unavailable	816.4786	816.4786 ~ 816.4786 MzDiff: `none`	alpha-Chaconine (BioDeep_00000003994) Formula: C45H73NO14 (851.5031)	-0.5 (100%)	Bathymodiolus [UBERON:0009120] gill filament

Found 6 Sample Hits

Metabolite	Species	Sample
alpha-Chaconine Formula: C45H73NO14 (851.5031) Adducts: [M+H-2H2O]+ (Ppm: 13)	Bathymodiolus (epithelial host cells)	MPIMM_039_QE_P_BP_CF_Bputeoserpentis_MALDI-FISH8_Sl14_s1_DHB_233x233_3um Resolution: 3μm, 233x234 Description
Porphyrin a Formula: C49H58N4O6 (798.4356) Adducts: [M+NH4]+ (Ppm: 17.8)	Mus musculus (Lung)	image3 Resolution: 40μm, 146x190 Description Fig. 4 MALDI-MSI data of mouse lung tissue after administration with D9-choline and U13C-DPPC–containing Poractant alfa surfactant (labels administered 12 h prior to tissue collection). 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-PC32:0+Na]+ (red) and [D9-PC32:0+Na]+ (green). Part-per-million (ppm) mass errors are indicated in parentheses. All images were visualized using total-ion-current normalization and using hotspot removal (high quantile = 99%). DPPC = PC16:0/16:0. MSI, mass spectrometry imaging; PC, phosphatidylcholine; U13C-DPPC, universally 13C-labeled dipalmitoyl PC.
alpha-Chaconine Formula: C45H73NO14 (851.5031) Adducts: [M+H-2H2O]+ (Ppm: 15.1)	Mytilus edulis (gill)	20190202_MS38_Crassostrea_Gill_350-1500_DHB_pos_A25_11um_305x210 Resolution: 11μm, 305x210 Description single cell layer `class_4` is the gill structure cells, metabolite ion 534.2956 is the top representive ion of this type of cell
PGP(16:1(9Z)/16:1(9Z)) Formula: C38H72O13P2 (798.4448) Adducts: [M+NH4]+ (Ppm: 8.5)	Homo sapiens (colorectal adenocarcinoma)	240TopL, 210TopR, 230BottomL, 220BottomR-centroid Resolution: 50μm, 142x141 Description
PGP(16:1(9Z)/16:1(9Z)) Formula: C38H72O13P2 (798.4448) Adducts: [M+NH4]+ (Ppm: 7.9)	Homo sapiens (colorectal adenocarcinoma)	200TopL, 170TopR, 190BottomL, 180BottomR-centroid Resolution: 50μm, 132x126 Description
PGP(16:1(9Z)/16:1(9Z)) Formula: C38H72O13P2 (798.4448) Adducts: [M+NH4]+ (Ppm: 8.5)	Homo sapiens (colorectal adenocarcinoma)	160TopL,130TopR,150BottomL,140BottomR-centroid Resolution: 50μm, 142x136 Description