Table 1.
Observed compounds in two coffee silverskin extracts via HPLC-ESI-HRMS/MS analysis.
| Sample | Observed Compounds | Molecular Formula | RT (Min) | Observed MW (m/z) | PubChem ID or Substance ID | CAS Number | Type |
|---|---|---|---|---|---|---|---|
| aCSE | Epicatechin | C15H14O6 | 16.07 | 289.8855 | 72276 | 490-46-0 | Flavonoids |
| Kaempferol | C15H10O6 | 10.14 | 285.9800 | 5280863 | 520-18-3 | Flavonoids | |
| Quercitrin | C21H20O11 | 9.02 | 448.1100 | 5280459 | 522-12-3 | Flavonoids | |
| 4-Hydroxycinnamic acid | C9H8O3 | 19.55 | 164.5500 | 637542 | 501-98-4 | Polyphenols (Phenolic Acids) | |
| Gallic acid | C7H6O5 | 16.02 | 170.1400 | 370 | 149-91-7 | Polyphenols (Phenolic Acids) | |
| rCSE | Shikimic Acid | C7H10O5 | 10.90 | 174.0855 | 8742 | 138-59-0 | Polyphenols (Phenolic Acids) |
| (2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-[7-hydroxy-3-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-(3,4,5-trihydroxyphenyl)chromenylium-5-yl]oxyoxane-3,4,5-triol | C27H31O17+ | 12.92 | 627.1522 | 10100906 | 17670-06-3 | Flavonoids | |
| Caffeic acid | C9H8O4 | 9.10 | 179.8800 | 689043 | 331-39-5 | Polyphenols (Phenolic Acids) | |
| Naringin | C27H32O14 | 15.13 | 580.0300 | 442428 | 10236-47-2 | Flavonoids | |
| Rutin | C27H30O16 | 13.56 | 610.0225 | 5280805 | 153-18-4 | Flavonoids | |
| (+)-Catechin | C15H14O6 | 14.30 | 290.0100 | 9064 | 154-23-4 | Flavonoids |
aCSE: Arabica-coffee silverskin extract; rCSE: Robusta-coffee silverskin extract; RT: Retention Time (Minutes); MW: Molecular Weight.