M/Z: 271.2228

Hit 3 annotations: (S)-10,16-Dihydroxyhexadecanoic acid_[M+H-H2O]+; 11-Oxohexadecanoic acid_[M+H]+; Melatonin_[M+K]+

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 4 Reference Ions Near m/z 271.2228

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000006326 Reliable	271.2165	271.2162 ~ 271.2169 MzDiff: `3.0 ppm`	Melatonin (BioDeep_00000000216) Formula: C13H16N2O2 (232.1212)	10.41 (100%)	Rattus norvegicus [UBERON:0004358] caput epididymis
MSI_000052723 Reliable	271.2277	271.2272 ~ 271.228 MzDiff: `3.3 ppm`	11-Oxohexadecanoic acid (BioDeep_00000021389) Formula: C16H30O3 (270.2195)	9.29 (100%)	DESI [NOVOCELL:BACKGROUND] blank
MSI_000038451 Unreliable	271.224	271.224 ~ 271.224 MzDiff: `none`	(S)-10,16-Dihydroxyhexadecanoic acid (BioDeep_00000006707) Formula: C16H32O4 (288.23)	2.03 (100%)	Posidonia oceanica [PO:0005059] root endodermis
MSI_000055784 Unreliable	271.2287	271.2287 ~ 271.2287 MzDiff: `none`	11-Oxohexadecanoic acid (BioDeep_00000021389) Formula: C16H30O3 (270.2195)	0.21 (100%)	Homo sapiens [UBERON:0007779] transudate

Found 6 Sample Hits

Metabolite	Species	Sample
(S)-10,16-Dihydroxyhexadecanoic acid Formula: C16H32O4 (288.23) Adducts: [M+H-H2O]+ (Ppm: 10.2)	Posidonia oceanica (root)	MS1_20180404_PO_1200 Resolution: 17μm, 193x208 Description
11-Oxohexadecanoic acid Formula: C16H30O3 (270.2195) Adducts: [M+H]+ (Ppm: 1.6)	Homo sapiens (esophagus)	LNTO22_1_4 Resolution: 17μm, 82x80 Description
11-Oxohexadecanoic acid Formula: C16H30O3 (270.2195) Adducts: [M+H]+ (Ppm: 2.7)	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).
Melatonin Formula: C13H16N2O2 (232.1212) Adducts: [M+K]+ (Ppm: 14.3)	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).
11-Oxohexadecanoic acid Formula: C16H30O3 (270.2195) Adducts: [M+H]+ (Ppm: 4.2)	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).
Melatonin Formula: C13H16N2O2 (232.1212) Adducts: [M+K]+ (Ppm: 14.7)	Homo sapiens (NA)	160TopL,130TopR,150BottomL,140BottomR-profile Resolution: 17μm, 142x136 Description