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. 2011 May 27;286(29):25644–25654. doi: 10.1074/jbc.M111.240739

TABLE 1.

Molecular ions and product ions of o-methylated PAH catechols detected by LC/MS/MS

O-Methylated catechols of quinones Molecular ions m/z, [M + H]+ Product ions m/z
[M + H-15]+ [M + H − 32]+ [M + H − 32 − 28]+
NP-1,2-dione (1) 175 143 115
C-1,2-dione (2) 275 243 215
C-3,4-dione (3) 275 243 215
5MC-7,8-dione (4) 289 257 229
BA-3,4-dione (5) 275 243 215
7MBA-3,4-dione (6) 289 257 229
12MBA-3,4-dione (7) 289 274 257 229
DMBA-3,4-dione (8) 303 288 271 243
B[c]Ph-3,4-dione (9) 275 243 215
B[a]P-7,8-dione (10) 299 267 239
B[g]C-11,12-dione (11) 325 293 265