M/Z: 705.444

Hit 2 annotations: Prephytoene diphosphate_[M+H-H2O]+; norerythromycin_[M-H2O+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 4 Reference Ions Near m/z 705.444

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000008471 Unreliable	705.4439	705.4439 ~ 705.4439 MzDiff: `0.2 ppm`	Prephytoene diphosphate (BioDeep_00000005203) Formula: C40H68O7P2 (722.444)	7.57 (100%)	Rattus norvegicus [UBERON:0004360] cauda epididymis
MSI_000023555 Unreliable	705.4458	705.4458 ~ 705.4458 MzDiff: `none`	norerythromycin (BioDeep_00000054431) Formula: C35H63NO13 (705.4299)	1.47 (100%)	Mus musculus [UBERON:0004263] upper arm skin
MSI_000024315 Unreliable	705.4405	705.4405 ~ 705.4405 MzDiff: `none`	Prephytoene diphosphate (BioDeep_00000005203) Formula: C40H68O7P2 (722.444)	1.79 (100%)	Mus musculus [UBERON:0004269] upper arm connective tissue
MSI_000027916 Unreliable	705.4531	705.4531 ~ 705.4531 MzDiff: `none`	Prephytoene diphosphate (BioDeep_00000005203) Formula: C40H68O7P2 (722.444)	2 (100%)	Mus musculus [UBERON:0002048] lung

Found 8 Sample Hits

Metabolite	Species	Sample
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 4.7)	Rattus norvegicus (Epididymis)	epik_dhb_head_ito08_43 Resolution: 17μm, 298x106 Description
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 4.8)	Rattus norvegicus (Epididymis)	epik_dhb_head_ito08_44 Resolution: 17μm, 299x111 Description
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 4.5)	Rattus norvegicus (Epididymis)	epik_dhb_head_ito08_46 Resolution: 17μm, 298x106 Description
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 4.5)	Rattus norvegicus (Epididymis)	epik_dhb_head_ito08_47 Resolution: 17μm, 301x111 Description
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 4.5)	Rattus norvegicus (Epididymis)	epik_dhb_head_ito08_48 Resolution: 17μm, 294x107 Description
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 15)	Mus musculus (Lung)	image1 Resolution: 40μm, 187x165 Description Fig. 2 MALDI-MSI data from the same mouse lung tissue analyzed in Fig. 1. A: Optical image of the post-MSI, H&E-stained tissue section. B–D, F–G: Ion images of (B) m/z 796.6855 ([U13C-DPPC+Na]+), (C) m/z 756.5514 ([PC32:0+Na]+), (D) m/z 765.6079 ([D9-PC32:0+Na]+), (F) m/z 754.5359 ([PC32:1+Na]+), and (G) m/z 763.5923 ([D9-PC32:1+Na]+). E, H: Ratio images of (E) [D9-PC32:0+Na]+:[PC32:0+Na]+ and (H) [D9-PC32:1+Na]+:[PC32:1+Na]+. 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. U13C-DPPC, universally 13C-labeled dipalmitoyl PC; PC, phosphatidylcholine; MSI, mass spectrometry imaging; H&E, hematoxylin and eosin. Fig 1-3, Fig S1-S3, S5
norerythromycin Formula: C35H63NO13 (705.4299) Adducts: [M-H2O+NH4]+ (Ppm: 10.5)	Mus musculus (Left upper arm)	357_l_total ion count Resolution: 50μm, 97x131 Description Diseased
Prephytoene diphosphate Formula: C40H68O7P2 (722.444) Adducts: [M+H-H2O]+ (Ppm: 10.6)	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.