Table 1. LC-MS-MS Analysis in the Negative Mode of the Fermented Rice Bran Extract.
| no. | name | Rt | molecular formula | MS1 [M – H]− | MS2 | refs |
|---|---|---|---|---|---|---|
| 1 | unidentified nitrogenous compound | 1.31 | 194 | 176, 149, 74, 59 | ||
| 2 | pantolactone | 1.34 | C6H10O3 | 129 | 127 | (29) |
| 3 | gluconic acid | 1.58 | C6H12O7 | 195 | 129, 99, 75, 59 | (30) |
| 4 | succinic acid | 3.02 | C4H6O4 | 117 | 99, 73 | (37) |
| 5 | citric acid | 3.05 | C?H?O? | 191 | 129, 111, 87, 85 | (30,37) |
| 6 | cinnamic acid | 3.96 | C9H8O2 | 147 | 103 | (31) |
| 7 | irilone | 3.99 | C16H10O6 | 297 | 205, 93 | (32) |
| 8 | 2-octanal | 4.01 | C8H14O | 125 | 97, 55 | (29) |
| 9 | apigenin-6/8-C-pentoside-8/6-C-hexoside | 10.05 | C26H28O14 | 563 | 503, 473, 383 | (33) |
| 10 | pentadecanoic acid | 10.31 | C15H30O2 | 241 | 223, 195 | (34) |
| 11 | heptanal | 11.18 | C7H14O | 113 | 85, 69 | (29) |
| 12 | tectoridin | 12.01 | C22H22O11 | 461 | 325, 279 | (32) |
| 13 | p-coumaric acid | 12.05 | C9H8O3 | 163 | 119 | (31,32,37,38) |
| 14 | hispidulin | 12.09 | C16H12O6 | 299 | 284 | (32) |
| 15 | ferulic acid | 12.87 | C10H10O4 | 193 | 178, 149, 134, 106 | (31,32,37,38) |
| 16 | p-hydroxybenzoic acid | 18.1 | C7H6O3 | 137 | 93 | (37,38) |
| 17 | coumaroylquinic acid | 18.19 | C16H18O8 | 337 | 191, 119 | (32) |
| 18 | methyl stearate | 18.3 | C19H38O2 | 297 | ND | (35) |
| 19 | hydroxyeicosanoic acid | 22.43 | C20H40O3 | 327 | ND | (36) |
| 20 | dimethyl quercetin | 22.97 | C17H14O7 | 329 | 283 | (32) |
| 21 | methyl palmitate | 28.61 | C17H34O2 | 293 | ND | (35) |