Table 3.
Cleavage products of wild rice proanthocyanidins after phloroglucinolysis and their major MS data.
| Retention Time (min) | [M + H]+ (m/z) | Fragment Ion (m/z) | Compound | ||
|---|---|---|---|---|---|
| Measured | Calculated | Error (ppm) | |||
| 2.71 | 431.0970 | 431.0973 | −0.67 | 305.0655, 263.0478 | EGC-Ph |
| 3.35 | 415.1024 | 415.1024 | −0.06 | 288.9869, 271.1326, 263.0480 | C-Ph |
| 3.67 | 415.1025 | 415.1024 | 0.27 | 288.9869, 271.1326, 263.0480 | EC-Ph |
| 4.18 | 307.0818 | 307.0812 | 1.89 | 181.0490 | EGC |
| 5.30 | 291.0862 | 291.0863 | −0.56 | 273.0747, 165.0544 | C |
| 6.00 | 291.0862 | 291.0863 | −0.56 | 273.0747, 165.0544 | EC |
Abbreviations: EGC-Ph, (−)-epigallocatechin-phloroglucinol derivative; C-Ph, (+)-catechin-phloroglucinol derivative; EC-Ph, (−)-epicatechin-phloroglucinol derivative; EGC, (−)-epigallocatechin; C, (+)-catechin; EC, (−)-epicatechin.