The following mass spectra of pyrrolidine derivatives (pyrrolidides)
of fatty acids can be accessed directly from the tabulated links below, or by scrolling down.
No comments or interpretation are provided here, as the general principles are discussed elsewhere in these web pages.
Further spectra may be added as they become available.
The source of each fatty acid listed is that from which I obtained the spectrum in the course of my research efforts,
not necessarily the optimum source.
Pyrrolidine derivatives of saturated straight-chain fatty acids (including those labelled with stable isotopes) |
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| butyrate (4:0) |
141 |
nonadecanoate (19:0) |
351 |
| hexanoate (6:0) |
169 |
eicosanoate (20:0) |
365 |
| octanoate (8:0) |
197 |
heneicosanoate (21:0) |
379 |
| decanoate (10:0) |
225 |
docosanoate (22:0) |
393 |
| undecanoate (11:0) |
239 |
tricosanoate( 23:0) |
407 |
| dodecanoate (12:0) |
253 |
tetracosanoate (24:0) |
421 |
| tridecanoate (13:0) |
267 |
pentacosanoate (25:0) |
435 |
| tetradecanoate (14:0) |
281 |
hexacosanoate (26:0) |
449 |
| pentadecanoate (15:0) |
295 |
heptacosanoate (27:0) |
463 |
| hexadecanoate (16:0) |
309 |
octacosanoate (28:0) |
477 |
| heptadecanoate (17:0) |
323 |
triacontanoate (30:0) |
505 |
| octadecanoate (18:0) |
337 |
|
|
| |
| 2,2-D-hexadecanoate |
311 |
4,4-D-hexadecanoate |
311 |
| 3,3-D-hexadecanoate |
311 |
D35-octadecanoate |
372 |
| |
| 2-13C-hexadecanoate |
310 |
1-13C-octadecanoate |
338 |
Pyrrolidine derivatives of saturated branched-chain fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 8-methyl-nonanoate (iso) |
225 |
13-methyl-eicosanoate |
379 |
| 8-methyl-decanoate (anteiso) |
239 |
18-methyl-eicosanoate (anteiso) |
379 |
| 10-methyl-undecanoate (iso) |
253 |
19-methyl-eicosanoate (iso) |
379 |
| 10-methyl-dodecanoate (anteiso) |
267 |
20-methyl-heneicosanoate (iso) |
393 |
| 12-methyl-tridecanoate (iso) |
281 |
15-methyl-docosanoate |
407 |
| 3-methyl-tetradecanoate |
295 |
20-methyl-docosanoate (anteiso) |
407 |
| 9-methyl-tetradecanoate |
295 |
21-methyl-docosanoate (iso) |
407 |
| 12-methyl-tetradecanoate (anteiso) |
295 |
22-methyl-tricosanoate (iso) |
421 |
| 13-methyl-tetradecanoate (iso) |
295 |
17-methyl-tetracosanoate |
435 |
| 13-methyl-pentadecanoate (anteiso) |
309 |
22-methyl-tetracosanoate (anteiso) |
435 |
| 14-methyl-pentadecanoate (iso) |
309 |
23-methyl-tetracosanoate (iso) |
435 |
| 10-methyl-hexadecanoate |
323 |
24-methyl-pentacosanoate (iso) |
449 |
| 14-methyl-hexadecanoate (anteiso) |
323 |
21-methyl-hexacosanoate |
463 |
| 15-methyl-hexadecanoate (iso) |
323 |
24-methyl-hexacosanoate (anteiso) |
463 |
| 14-methyl-heptadecanoate |
337 |
26-methyl-heptacosanoate (iso) |
477 |
| 16-methyl-heptadecanoate (iso) |
337 |
26-methyl-octacosanoate (anteiso) |
491 |
| 11-methyl-octadecanoate |
351 |
28-methyl-nonacosanoate (iso) |
505 |
| 16-methyl-octadecanoate (anteiso) |
351 |
28-methyl-triacontanoate (anteiso) |
519 |
| 17-methyl-octadecanoate (iso) |
351 |
30-methyl-hentriacontanoate (iso) |
533 |
| 18-methyl-nonadecanoate (iso) |
365 |
30-methyl-dotriacontanoate (anteiso) |
547 |
| |
| 4,8,12-trimethyl-tridecanoate |
309 |
8,10-dimethyl-hexadecanoate |
337 |
|
|
3,7,11,15-tetramethyl-hexadecanoate |
365 |
Pyrrolidine derivatives of monoenoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 9-decenoate (9-10:1) |
223 |
4-hexadecenoate (4-16:1) |
307 |
| 9-dodecenoate (9-12:1) |
251 |
5-hexadecenoate (5-16:1) |
307 |
| 9-tetradecenoate (9-14:1) |
279 |
9-hexadecenoate (9-16:1) |
307 |
| 2t-hexadecenoate |
307 |
11-hexadecenoate (11-16:1) |
307 |
| 3t-hexadecenoate |
307 |
|
|
| |
| 8-heptadecenoate (8-17:1) |
321 |
9-heptadecenoate (9-17:1) |
321 |
| |
| 2t-octadecenoate (2-18:1) |
335 |
10-octadecenoate (10-18:1) |
335 |
| 3t-octadecenoate (3-18:1) |
335 |
11-octadecenoate (11-18:1) |
335 |
| 4-octadecenoate (4-18:1) |
335 |
12-octadecenoate (12-18:1) |
335 |
| 5-octadecenoate (5-18:1) |
335 |
13-octadecenoate (13-18:1) |
335 |
| 6-octadecenoate (6-18:1) |
335 |
14-octadecenoate (14-18:1) |
335 |
| 7-octadecenoate (7-18:1) |
335 |
15-octadecenoate (15-18:1) |
335 |
| 8-octadecenoate (8-18:1) |
335 |
16-octadecenoate (16-18:1) |
335 |
| 9-octadecenoate (9-18:1) |
335 |
17-octadecenoate (17-18:1) |
335 |
| |
| 5-eicosenoate (5-20:1) |
363 |
11-eicosenoate (11-20:1) |
363 |
| 7-eicosenoate (7-20:1) |
363 |
13-eicosenoate (13-20:1) |
363 |
| |
| 7-docosenoate (7-22:1) |
391 |
13-docosenoate (13-22:1) |
391 |
| 11-docosenoate (11-22:1) |
391 |
15-docosenoate (15-22:1) |
391 |
| |
| 15-tetracosenoate (15-24:1) |
419 |
19-hexacosenoate (19-26:1) |
447 |
| 17-tetracosenoate (17-24:1) |
419 |
19-octacosenoate (19-28:1) |
475 |
| 17-hexacosenoate (17-26:1) |
447 |
21-triacontenoate (21-30:1) |
503 |
| |
| 7-methyl-hexadec-6-enoate |
321 |
|
|
Pyrrolidine derivatives of dienoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 5,9-hexadecadienoate (5,9-16:2) |
305 |
3,9-octadecadienoate (3,9-18:2) |
333 |
| 9,12-hexadecadienoate (9,12-16:2) |
305 |
7,11-octadecadienoate (7,11-18:2) |
333 |
| 5,8-heptadecadienoate (5,8-17:2) |
319 |
8,12-octadecadienoate (8,12-18:2) |
333 |
| 5,9-heptadecadienoate (5,9-17:2) |
319 |
9c,11t-octadecadienoate (9,11-18:2) |
333 |
| 9,12-heptadecadienoate (9,12-17:2) |
319 |
10t,12c-octadecadienoate (10,12-18:2) |
333 |
| 4,7-octadecadienoate (4,7-18:2) |
333 |
|
|
| 5,8-octadecadienoate (5,8-18:2) |
333 |
9,12-nonadecadienoate (9,12-19:2) |
347 |
| 6,9-octadecadienoate (6,9-18:2) |
333 |
|
|
| 7,10-octadecadienoate (7,10-18:2) |
333 |
9,13-eicosadienoate (9,13-20:2) |
361 |
| 8,11-octadecadienoate (8,11-18:2) |
333 |
11,14-eicosadienoate (11,14-20:2) |
361 |
| 9,12-octadecadienoate (18:2(n-6)) |
333 |
5,13-docosadienoate (5,13-22:2) |
389 |
| 10,13-octadecadienoate (10,13-18:2) |
333 |
7,13-docosadienoate (7,13-22:2) |
389 |
| 11,14-octadecadienoate (11,14-18:2) |
333 |
7,15-docosadienoate (7,15-22:2) |
389 |
| 12,15-octadecadienoate (12,15-18:2) |
333 |
5,9-tricosadienoate (5,9-23:2) |
403 |
| 13,16-octadecadienoate (13,16-18:2) |
333 |
5,9-tetracosadienoate (5,9-24:2) |
417 |
| 14,17-octadecadienoate (14,17-18:2) |
333 |
5,9-pentacosadienoate (5,9-25:2) |
431 |
|
|
5,9-hexacosadienoate (5,9-26:2) |
445 |
| 2,6-octadecadienoate (2,6-18:2) |
333 |
17,21-octacosadienoate (17,21-28:2) |
473 |
| |
| 23-methyl-tetracosa-5,9-dienoate |
431 |
24-methyl-pentacosa-5,9-dienoate |
445 |
Pyrrolidine derivatives of polyunsaturated fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 7,10,13-hexadecatrienoate (16:3(n-3)) |
303 |
5,8,11-eicosatrienoate (20:3(n-9)) |
359 |
| 9,12,15-hexadecatrienoate (16:3(n-1)) |
303 |
5,9,13-eicosatrienoate (5,9,13-20:3) |
359 |
| 8,11,14-heptadecatrienoate (17:3(n-3)) |
317 |
5,11,14-eicosatrienoate (5,11,14-20:3) |
359 |
| |
|
8,11,14-eicosatrienoate (20:3(n-6)) |
359 |
| 3,9,12-octadecatrienoate (3,9,12-18:3) |
331 |
7,13,16-docosatrienoate (7,13,16-22:3) |
387 |
| 5,9,12-octadecatrienoate (5,9,12-18:3) |
331 |
|
|
| 6,9,11-octadecatrienoate (6,9,11-18:3) |
331 |
5,9,17-hexacosatrienoate (5,9,17-26:3) |
443 |
| 6,9,12-octadecatrienoate (18:3(n-6)) |
331 |
5,9,19-hexacosatrienoate (5,9,19-26:3) |
443 |
| 9,12,15-octadecatrienoate (18:3(n-3)) |
331 |
5,9,19-octacosatrienoate (5,9,19-28:3) |
471 |
| |
| 6,9,11,15-octadecatetraenoate |
329 |
5,8,12,14-eicosatetraenoate (5,8,12,14-20:4) |
357 |
| 6,9,12,15-octadecatetraenoate (18:4(n-3)) |
329 |
5,8,14,16-eicosatetraenoate (5,8,14,16-20:4) |
357 |
| 5,8,11,14-eicosatetraenoate (20:4(n-6)) |
357 |
7,10,13,16-docosatetraenoate (22:4(n-6)) |
385 |
| |
| 5,8,11,14,17-eicosapentaenoate (20:5(n-3)) |
355 |
4,7,10,13,16-docosapentaenoate (22:5(n-6)) |
383 |
| 6,9,12,15,18-heneicosapentaenoate (21:5(n-3)) |
369 |
7,10,13,16,19-docosapentaenoate (22:5(n-3)) |
383 |
| |
| 4,7,10,13,16,19-docosahexaenoate (22:6(n-3)) |
381 |
6,9,12,15,18,21-tetracosahexaenoate (24:6(n-3)) |
409 |
Pyrrolidine derivatives of acetylenic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| octadeca-9-ynoate |
333 |
docosa-13-yn,trans-15-enoate |
387 |
| octadeca-9-yn,trans-11-enoate |
331 |
tetracosa-15-yn,trans-17-enoate |
415 |
| octadeca-9-en,12-ynoate |
331 |
hexacosa-17-yn,trans-19-enoate |
443 |
| eicosa-11-yn,trans-13-enoate |
359 |
octadeca-8,10-dien-12-ynoate |
329 |
Pyrrolidine derivatives of natural cyclic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 9,10-methylene-hexadecanoate |
321 |
11,12-methylene-octadecanoate |
349 |
| 9,10-methylene-octadecanoate |
349 |
|
|
| |
| 8,9-methylene-heptadec-8-enoate |
333 |
9,10-methylene-octadec-9-enoate |
347 |
| |
| 11-cyclopentylundecanoate |
307 |
13-cyclopentyltridecanoate |
335 |
| 11-cyclopent-2-enylundecanoate |
305 |
15-cyclopent-2-enylpentadecanoate |
361 |
| 13-cyclopent-2-enyltridecanoate |
333 |
15-cyclopent-2-enylpentadec-9-enoate |
359 |
| 13-cyclopent-2-enyltridec-4-enoate |
331 |
|
|
| |
| 11-phenyl-undecanoate |
315 |
13-phenyl-tridecanoate |
343 |
|
|
15-phenyl-pentadec-9-enoate |
369 |
Pyrrolidine derivatives of oxygenated fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 12,13-epoxy-octadec-9-enoate |
349 |
09,10-epoxy-octadec-12-enoate |
349 |
| |
| 10,13-epoxy-11,12-dimethyl-hexadecadienoate |
347 |
12,15-epoxy-13,14-dimethyl-octadecadienoate |
375 |
| 10,13-epoxy-11-methyl-octadecadienoate |
361 |
12,15-epoxy-13,14-dimethyl-eicosadienoate |
403 |
| |
| 3-hydroxydecanoate |
241 |
2-hydroxyoctadecanoate |
353 |
| 2-hydroxydodecanoate |
269 |
17-hydroxyoctadecanoate |
353 |
| 3-hydroxydodecanoate |
269 |
20-hydroxyeicosanoate - TMS ether |
453 |
| 12-hydroxydodecanoate |
269 |
2-hydroxydocosanoate |
409 |
| 2-hydroxytetradecanoate |
297 |
22-hydroxydocosanoate |
409 |
| 3-hydroxytetradecanoate |
297 |
22-hydroxydocosanoate - TMS ether |
481 |
| 2-hydroxypentadecanoate |
311 |
2-hydroxytricosanoate |
423 |
| 15-hydroxypentadecanoate |
311 |
2-hydroxytetracosanoate |
437 |
| 2-hydroxyhexadecanoate |
325 |
24-hydroxytetracosanoate |
437 |
| 15-hydroxyhexadecanoate |
325 |
24-hydroxytetracosanoate - TMS ether |
509 |
| 15-hydroxyhexadecanoate - TMS ether |
397 |
2-hydroxypentacosanoate |
451 |
| 16-hydroxyhexadecanoate |
325 |
2-hydroxyhexacosanoate |
465 |
| 16-hydroxyhexadecanoate - TMS ether |
397 |
26-hydroxyhexacosanoate - TMS ether |
537 |
| 2-hydroxyheptadecanoate |
339 |
|
|
| |
| 9-hydroxy-octadec-12-enoate |
351 |
18-hydroxy-octadec-9-enoate - TMS |
423 |
| 9-hydroxy-octadec-12-enoate - TMS ether |
423 |
14-hydroxy-eicos-11-enoate |
379 |
| 12-hydroxy-octadec-9-enoate |
351 |
14-hydroxy-eicos-11-enoate - TMS ether |
451 |
| 12-hydroxy-octadec-9-enoate - TMS ether |
423 |
20-hydroxy-eicos-11-enoate - TMS ether |
451 |
| 18-hydroxy-octadec-9-enoate |
351 |
|
|
| |
| 2-hydroxy-16-methyl-heptadecanoate |
353 |
2-hydroxy-octadeca-9,12,15-trienoate |
347 |
| |
| 12-methoxy-octadec-9-enoate |
365 |
|
|
Pyrrolidine derivatives of dicarboxylic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 1,9-nonanedioate |
294 |
1,18-octadecanedioate |
420 |
| 1,11-undecanedioate |
322 |
1,20-eicosanedioate |
448 |
| 1,12-dodecanedioate |
336 |
1,22-docosanedioate |
476 |
| 1,14-tetradecanedioate |
364 |
1,24-tetracosanedioate |
504 |
| 1,16-hexadecanedioate |
392 |
|
|
|
|
1,18-octadec-9-enedioate |
418 |
Pyrrolidine derivatives of fluorinated fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 18-fluoro-octadecanoate |
355 |
20-fluoro-eicosanoate |
383 |
| 18-fluoro-octadec-9-enoate |
353 |
20-fluoro-eicos-11-enoate |
381 |
| 18-fluoro-octadec-9,12-dienoate |
351 |
|
|
