M/Z: 688.5035

Hit 2 annotations: PE(P-16:0/20:4)_[M+H-2H2O]+; SM(d18:0/14:1(9Z)(OH))_[M]+

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

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000047839 Unreliable	688.4981	688.4981 ~ 688.4981 MzDiff: `none`	PE(P-16:0/20:4) (BioDeep_00000031952) Formula: C41H74NO7P (723.5203)	2.07 (100%)	Homo sapiens [UBERON:0013067] colorectal mucosa
MSI_000052009 Unreliable	688.5019	688.5019 ~ 688.5019 MzDiff: `none`	PE(P-16:0/20:4) (BioDeep_00000031952) Formula: C41H74NO7P (723.5203)	2.36 (100%)	Homo sapiens [UBERON:0001052] rectum

Metabolite	Species	Sample
PE(P-16:0/20:4) Formula: C41H74NO7P (723.5203) Adducts: [M+H-2H2O]+ (Ppm: 4.2)	Homo sapiens (esophagus)	LNTO22_1_3 Resolution: 75μm, 121x68 Description
SM(d18:0/14:1(9Z)(OH)) Formula: C37H73N2O7P (688.5155) Adducts: [M]+ (Ppm: 14.5)	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).
PE(P-16:0/20:4) Formula: C41H74NO7P (723.5203) Adducts: [M+H-2H2O]+ (Ppm: 6.5)	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).
PE(P-16:0/20:4) Formula: C41H74NO7P (723.5203) Adducts: [M+H-2H2O]+ (Ppm: 4.2)	Homo sapiens (NA)	160TopL,130TopR,150BottomL,140BottomR-profile Resolution: 17μm, 142x136 Description
PE(P-16:0/20:4) Formula: C41H74NO7P (723.5203) Adducts: [M+H-2H2O]+ (Ppm: 6.4)	Homo sapiens (esophagus)	LNTO22_2_1 Resolution: 75μm, 89x88 Description