Ojima:KOX00428n

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All Molecules KOX PR PBX COX

Ion Frequency

Prec.-Product

Neutral Loss

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7-Methylguanine

IDs and Links
MassBank	7-Methylguanine
CAS	578-76-7
Keio ID	M043-

Top 10 Similar Molecules of 7-Methylguanine

Ranking	About scoring
M104+ Score:6.23 M074+ Score:6.23 P081+ Score:5.38 P049+ Score:5.38 P036+ Score:5.38 M043+ Score:5.38 M042+ Score:5.38 F014+ Score:5.38	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。

Links

Page list for each fragment
Pages Related to Peak C5H5N4:   F014+  M042+  M043+  P036+  P049+  P081+   Pages Related to Peak C5H4N3:   M074+  M104+

Annotations

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。

KOX00428n	164 C6H6N5O	149 C5H3N5O	121 C5H5N4	106 C5H4N3	42 CNO
164 C6H6N5O
149 C5H3N5O	CH3
121 C5H5N4	CHNO
106 C5H4N3	CH2N2O		HN
42 CNO	C5H6N4	C4H3N4

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