TABLE 9

Product ion summary and interpretation of ruboxistaurin metabolites

Metabolite
[M + H]+
Product Ions
Identity
Dog
Mouse
Rat
m/z
Ruboxistaurin 469 451, 424, 406, 398, 384, 289, 98, 84, 58 Embedded Image P U F P U F P U B F
2 441 424, 423, 406, 398, 384, 289, 70 N,N-di-desmethyl P U F P U F U B F
1 455 424, 412, 406, 398, 384, 289, 84 N-desmethyl P U F P U F P U B F
20 456 439, 413, 410, 385, 366, 354 Acid, oxidative deamination F
17 471 454, 440, 428, 414, 289, 84 A-ring hydroxy-N-desmethyl F U F B F
26 471 454, 453, 440, 428, 414, 390, 370, 327 hydroxy-N-desmethyl F
10 471 453, 440, 428, 414, 197, 184, 156, 84 21-hydroxy-N-desmethyl U F U F U B F
9 471 454, 428, 414, 271, 176, 169, 157, 145, 84 2-hydroxy-N-desmethyl F
5 471 453, 440, 428, 414, 396, 289, 84 7-hydroxy-N-desmethyl P U F P U F U B
15 471 453, 440, 428, 414, 305, 84 B ring-hydroxy-N-desmethyl U F U F F
8 471 453, 440, 414, 271, 176, 169, 157, 145, 84, 70 2-hydroxy-N-desmethyl U F U F
11 471 453, 440, 197, 184, 156, 84 21-hydroxy-N-desmethyl F
24 485 440, 414, 384, 271, 176, 169, 145, 98, 58 2-hydroxy F
12 485 440, 422, 412, 400, 324, 184, 156, 98, 84, 58 21-hydroxy U F U F B
3 a 485 467, 440, 422, 414, 289, 98, 84, 58 7-hydroxy P U F U F B U F
14 a 485 440, 305, 98, 84 B ring-hydroxy U F U F F
7 485 467, 441, 440, 422, 414, 271, 176, 169, 145, 84, 58 2-hydroxy U F U F F
13 485 440, 422, 412, 324, 184, 156, 98, 84, 58 21-hydroxy U F B
16 485 440, 422, 414, 289, 84, 58 A ring-hydroxy F
6 b 485 468, 467, 424, 289, 98, 84, 58 N,N-dimethyl N-oxide P F
19 647 471, 440, 428, 414, 289 A ring-hydroxy-N-desmethyl + glucuronide U P U B
21 647 471, 440, 414 hydroxy-N-desmethyl + glucuronide U B
25 647 471 hydroxy-N-desmethyl + glucuronide U B
18 661 485, 440 hydroxy + glucuronide U Bc
22 661 485, 454, 440, 289, 58 A ring-hydroxy glucuronide U F B
23
661
485, 440, 305
B ring-hydroxy glucuronide
U
B

  • P, plasma; U, urine; B, bile; F, feces.

  • ↵ a 3 and 14 are not completely resolved in dog feces, and product ions listed for 14 may actually be product ions of 3. The major spectral difference is that 3 has an m/z 289 ion and 14 has an m/z 305 ion.

  • ↵ b 6 was detected in a 4-h dog plasma sample.