M/Z: 421.321

Hit 5 annotations: N-Eicosapentaenoyl Threonine_[M+NH4]+; N6-[2-[5-(Diethylamino)pentan-2-ylamino]-6-methyl-4-pyrimidinyl]-2-methylquinoline-4,6-diamine_[M-H2O+NH4]+; Citranaxanthin_[M+H-2H2O]+; Farnesiferol A_[M+K]+; N-Docosahexaenoyl Lysine_[M+H-2H2O]+

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 6 Reference Ions Near m/z 421.321

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000057763 Reliable	421.3115	421.3112 ~ 421.312 MzDiff: `3.2 ppm`	Farnesiferol A (BioDeep_00000018316) Formula: C24H30O4 (382.2144)	4.03 (66%)	DESI [NOVOCELL:BACKGROUND] blank
MSI_000057783 Reliable	421.3296	421.3293 ~ 421.3298 MzDiff: `1.8 ppm`	6-Ethylchenodeoxycholic acid (BioDeep_00000174922) Formula: C26H44O4 (420.3239)	5.79 (100%)	DESI [NOVOCELL:BACKGROUND] blank
MSI_000065319 Unreliable	421.3213	421.3213 ~ 421.3213 MzDiff: `0.3 ppm`	N-Docosahexaenoyl Lysine (BioDeep_00000171297) Formula: C28H44N2O3 (456.3352)	3.74 (100%)	Homo sapiens [UBERON:0001155] colon
MSI_000047129 Unreliable	421.3116	421.3116 ~ 421.3116 MzDiff: `none`	N6-[2-[5-(Diethylamino)pentan-2-ylamino]-6-methyl-4-pyrimidinyl]-2-methylquinoline-4,6-diamine (BioDeep_00000181814) Formula: C24H35N7 (421.2954)	2.75 (100%)	Homo sapiens [UBERON:0013067] colorectal mucosa
MSI_000047166 Unreliable	421.3174	421.3174 ~ 421.3174 MzDiff: `none`	Citranaxanthin (BioDeep_00000025440) Formula: C33H44O (456.3392)	2.65 (100%)	Homo sapiens [UBERON:0013067] colorectal mucosa
MSI_000055819 Unreliable	421.3124	421.3124 ~ 421.3124 MzDiff: `none`	Farnesiferol A (BioDeep_00000018316) Formula: C24H30O4 (382.2144)	0.01 (100%)	Homo sapiens [UBERON:0007779] transudate

Found 14 Sample Hits

Metabolite	Species	Sample
N-Eicosapentaenoyl Threonine Formula: C24H37NO4 (403.2722) Adducts: [M+NH4]+ (Ppm: 12.9)	Homo sapiens (esophagus)	LNTO29_16_2 Resolution: 17μm, 95x101 Description
N6-[2-[5-(Diethylamino)pentan-2-ylamino]-6-methyl-4-pyrimidinyl]-2-methylquinoline-4,6-diamine Formula: C24H35N7 (421.2954) Adducts: [M-H2O+NH4]+ (Ppm: 17.4)	Homo sapiens (esophagus)	LNTO30_8M_1 Resolution: 17μm, 69x54 Description
Citranaxanthin Formula: C33H44O (456.3392) Adducts: [M+H-2H2O]+ (Ppm: 18.9)	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).
Citranaxanthin Formula: C33H44O (456.3392) Adducts: [M+H-2H2O]+ (Ppm: 10.3)	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).
Citranaxanthin Formula: C33H44O (456.3392) Adducts: [M+H-2H2O]+ (Ppm: 7)	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).
Citranaxanthin Formula: C33H44O (456.3392) Adducts: [M+H-2H2O]+ (Ppm: 11.5)	Homo sapiens (NA)	160TopL,130TopR,150BottomL,140BottomR-profile Resolution: 17μm, 142x136 Description
Farnesiferol A Formula: C24H30O4 (382.2144) Adducts: [M+K]+ (Ppm: 2.3)	Homo sapiens (esophagus)	LNTO29_16_3 Resolution: 17μm, 108x107 Description
Farnesiferol A Formula: C24H30O4 (382.2144) Adducts: [M+K]+ (Ppm: 1.8)	Homo sapiens (esophagus)	LNTO30_8M_2 Resolution: 75μm, 108x68 Description
Farnesiferol A Formula: C24H30O4 (382.2144) Adducts: [M+K]+ (Ppm: 1.3)	Homo sapiens (esophagus)	LNTO30_8M_4 Resolution: 75μm, 62x48 Description
N6-[2-[5-(Diethylamino)pentan-2-ylamino]-6-methyl-4-pyrimidinyl]-2-methylquinoline-4,6-diamine Formula: C24H35N7 (421.2954) Adducts: [M-H2O+NH4]+ (Ppm: 16.9)	Homo sapiens (esophagus)	LNTO30_8M_5 Resolution: 75μm, 56x54 Description
Citranaxanthin Formula: C33H44O (456.3392) Adducts: [M+H-2H2O]+ (Ppm: 7.2)	Homo sapiens (esophagus)	LNTO30_8M_5 Resolution: 75μm, 56x54 Description
N6-[2-[5-(Diethylamino)pentan-2-ylamino]-6-methyl-4-pyrimidinyl]-2-methylquinoline-4,6-diamine Formula: C24H35N7 (421.2954) Adducts: [M-H2O+NH4]+ (Ppm: 17.7)	Homo sapiens (esophagus)	LNTO29_18_2 Resolution: 75μm, 62x68 Description
N-Docosahexaenoyl Lysine Formula: C28H44N2O3 (456.3352) Adducts: [M+H-2H2O]+ (Ppm: 0.1)	Homo sapiens (colorectal adenocarcinoma)	200TopL, 170TopR, 190BottomL, 180BottomR-centroid Resolution: 50μm, 132x126 Description
N-Docosahexaenoyl Lysine Formula: C28H44N2O3 (456.3352) Adducts: [M+H-2H2O]+ (Ppm: 0.1)	Homo sapiens (colorectal adenocarcinoma)	160TopL,130TopR,150BottomL,140BottomR-centroid Resolution: 50μm, 142x136 Description