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Table 2 Mass fragmentation of steroid derivatives

From: Rapid determination of natural steroidal hormones in saliva for the clinical diagnoses

Derivative M+ M+- CH3 M+- HOTMS M+- OTMS-CH4 M+-TMSO-CH2-CH3 D-ring cleavage Others
di-TMS-E1 414(87.2)* **399(55.1) - **309(16.6) - 285(4.8) 231(4.3)
di-TMS-α-E2 416(94.1)* 401(7.1) **326(10.6) 309(3.5) 298(9.4) **285(72.4) 129(32.4)
tri-TMS-E3 504(76.9)* 489(9.3) 414(7.7) 399(5.0) 386(26.4) 285(23.7) **345(39.6), **311(36.8)
di-TMS-P 458(63.5)* **443(46.5) - 353(4.1) - - **157(32.9)
di-TMS-T 432(100)* **417(13.1) 342(1.3) 327(2.0) - - **208(11.1)
di-TMS-T-d3 435(100)* **420(16.9) 345(1.5) 330(2.4) - - **209(17.5)
  1. * = the quantification ion; ** = the qualification ion; () = relative abundance