MassBank:KOX00145p

General Index

All Molecules KOX PR PBX COX

Ion Frequency

Prec.-Product

Neutral Loss

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Cytosine

IDs and Links
MassBank	Cytosine
CAS	71-30-7
Keio ID	C033+

Top 10 Similar Molecules of Cytosine

Ranking	About scoring
KOX00631p Score:20.08 KOX00197p Score:20.08 KOX00174p Score:20.08 KOX00780p Score:12.19 KOX00111p Score:12.19 KOX00876p Score:8.42 KOX00721p Score:8.42 KOX00429p Score:8.42 KOX00427p Score:8.42 KOX00315p Score:8.42	The similarity score between two molecules is defined as the sum of Shannon entropy of ionic formulas shared by the molecules: $\textstyle - \sum_{p\in shared} \log(\mbox{frequency}(p))$ 代謝物間の類似度スコアは、それらのスペクトルで共有される（アノテートされた）イオン式のシャノン情報量の総和です。

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Annotations

Precursor	Product	Comments
C4H6N3O (112)	C4H3N2O (95)	b
C4H6N3O (112)	C4H4N3 (94)	c
C4H6N3O (112)	C2H3N2O (71)	d,-NH3
C4H6N3O (112)	C3H5N2 (69)	a,-NH3
C4H6N3O (112)	C3H2NO (68)	e

Precursor-Product Relationship

About the PP Table (行列表示について)
The matrix is viewed columnwise. The topmost precursor ion in bold face produces the product ions beneath it. Each formula in matrix cells corresponds to the neutral loss. Blackout cells indicate products that cannot be derived, and orange cells indicate a structurally plausible link produced by cleaving a single chemical bond (in cases of ring-opening, two bonds).	行列は列方向に見ます。最上段太字の前駆イオン(precursor ion)が直下の生成イオン群(product ions)になると解釈します。 行列要素に書かれている組成式はニュートラルロスです。黒は前駆イオンから生成しえない関係、オレンジは分子構造における共有結合1本の切断（開環の場合は2本）で生じる関係を意味します。

KOX00145p	112 C4H6N3O	95 C4H3N2O	94 C4H4N3	71 C2H3N2O	69 C3H5N2	68 C3H2NO	52 C3H2N
112 C4H6N3O
95 C4H3N2O	H3N
94 C4H4N3	H2O
71 C2H3N2O	C2H3N	C2
69 C3H5N2	CHNO
68 C3H2NO	CH4N2	CHN
52 C3H2N	CH4N2O	CHNO	CH2N2		H3N	O

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