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) |