TABLE 2.
Major chemical components of QLX
| Peak No. | Compound | Retention time (min) | Molecular formula | Theoretical value [M‐H]‐ (m/z) |
Measured value [M‐H]‐ (m/z) |
Theoretical value [M + H]+ (m/z) | Measured value [M + H]+ (m/z) | Content (mg/g) | RSD (%) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Gallic acid | 4.985 | C7H6O5 | 169.0142 | 169.0143 | 11.8102 | 2.40 | ||
| 2 | Protocatechuic acid | 9.745 | C7H6O4 | 153.0193 | 153.0192 | 7.4144 | 1.21 | ||
| 3 | Caftaric acid | 12.823 | C13H12O9 | 311.0409 | 311.0408 | 0.9175 | 1.34 | ||
| 4 | Neochlorogenic acid | 13.109 | C16H18O9 | 353.0878 | 353.0867 | 11.5105 | 2.27 | ||
| 5 | Protocatechualdehyde | 13.848 | C7H6O3 | 139.0390 | 139.0386 | 0.3877 | 1.11 | ||
| 6 | Chlorogenic acid | 20.627 | C16H18O9 | 353.0878 | 353.0881 | 45.1841 | 1.77 | ||
| 7 | Caffeic acid | 22.746 | C9H8O4 | 179.0350 | 179.0346 | 4.3270 | 0.77 | ||
| 8 | Cryptochlorogenic acid | 23.200 | C16H18O9 | 353.0878 | 353.0872 | 29.4802 | 0.99 | ||
| 9 | 4‐Hydroxycinnamic acid | 30.180 | C9H8O3 | 163.0401 | 163.0402 | 2.3235 | 1.31 | ||
| 10 | Chicoric acid | 34.267 | C22H18O12 | 473.0725 | 473.0716 | 2.1110 | 2.98 | ||
| 11 | Taxifolin | 36.050 | C15H12O7 | 303.0510 | 303.0504 | 1.8699 | 2.01 | ||
| 12 | Isoquercitrin | 37.143 | C21H20O12 | 463.0882 | 463.0872 | 33.4400 | 1.55 | ||
| 13 | Isochlorogenic acid B | 39.397 | C25H24O12 | 515.1195 | 515.1183 | 0.8676 | 1.21 | ||
| 14 | Isochlorogenic acid A | 40.338 | C25H24O12 | 515.1195 | 515.1183 | 2.2490 | 1.54 | ||
| 15 | Isochlorogenic acid C | 42.289 | C25H24O12 | 515.1195 | 515.1195 | 1.3349 | 1.26 | ||
| 16 | Rosmarinic acid | 43.130 | C18H16O8 | 359.0772 | 359.0770 | 12.4849 | 0.91 | ||
| 17 | Salvianolic acid B | 46.208 | C36H30O16 | 717.1461 | 717.1453 | 11.5584 | 1.93 | ||
| 18 | Oxypeucedanin hydrate | 47.754 | C16H16O6 | 305.102 | 305.1021 | 1.5817 | 1.11 | ||
| 19 | Byakangelicin | 49.066 | C17H18O7 | 335.1125 | 335.113 | 1.7135 | 1.19 | ||
| 20 | Salvianolic acid A | 49.421 | C26H22O10 | 493.1140 | 493.1140 | 20.8320 | 1.12 | ||
| 21 | Xanthotoxin | 54.078 | C12H8O4 | 217.0495 | 217.0492 | 0.3422 | 1.35 | ||
| 22 | Kaempferol | 55.861 | C15H10O6 | 287.055 | 287.0553 | 0.0709 | 0.98 | ||
| 23 | Bergapten | 58.031 | C12H8O4 | 217.0495 | 217.0496 | 0.5281 | 1.49 | ||
| 24 | Oxypeucedanin | 63.345 | C16H14O5 | 287.0914 | 287.0917 | 1.4303 | 1.68 | ||
| 25 | Imperatorin | 71.418 | C16H14O4 | 271.0965 | 271.0963 | 7.0624 | 0.59 | ||
| 26 | Phellopterin | 89.986 | C17H16O5 | 301.1071 | 301.1071 | 3.9297 | 1.37 | ||
| 27 | Isoimperatorin | 92.476 | C16H14O4 | 271.0965 | 271.097 | 1.8017 | 1.31 | ||
| 28 | Cryptotanshinone | 94.376 | C19H20O3 | 297.1485 | 297.1492 | 0.1191 | 1.39 |