Table I. Tricin-oligolignols detected in maize.
| No. | tR | m/z | Formula | ∆ppm | Shorthand Name | Elucidation Levela |
|---|---|---|---|---|---|---|
| Dimers | ||||||
| 3h | 19.9 | 495.12891 | C26H23O10 | −1.5 | T-(4-O-βt)-H | Identified |
| 3h | 20.6 | 495.12907 | C26H23O10 | −1.2 | T-(4-O-βe)-H | Identified |
| 3g | 20.4 | 525.13906 | C27H25O11 | −2.2 | T-(4-O-βt)-G | Identified |
| 3g | 21.2 | 525.13889 | C27H25O11 | −2.6 | T-(4-O-βe)-G | Identified |
| 3g′ | 24.7 | 567.14943 | C29H27O12 | −2.4 | T-(4-O-βt)-G′ | Identified |
| 3g′ | 25.0 | 567.15031 | C29H27O12 | −0.8 | T-(4-O-βe)-G′ | Identified |
| 3g′′ | 25.7 | 671.17480 | C36H31O13 | −3.3 | T-(4-O-βt)-G′′ | Identified |
| 3g′′ | 25.9 | 671.17447 | C36H31O13 | −3.8 | T-(4-O-βe)-G′′ | Identified |
| 3s′′ | 25.5 | 701.18628 | C37H33O14 | −1.9 | T-(4-O-βt)-S′′ | Identified |
| 3s′′ | 25.7 | 701.18532 | C37H33O14 | −3.2 | T-(4-O-βe)-S′′ | Identified |
| 3gαOMe | 24.7 | 539.15522 | C28H27O11 | −1.2 | T-(4-O-β)-GαOMe | Annotated |
| Trimers | ||||||
| 4gg | 18.9 | 721.21084 | C37H37O15 | −4.1 | T-(4-O-β)-G-(4-O-β)-G | Annotated |
| 4gg | 19.2 | 721.21151 | C37H37O15 | −3.2 | T-(4-O-β)-G-(4-O-β)-G | Annotated |
| 4gg | 19.4 | 721.21334 | C37H37O15 | −0.6 | T-(4-O-β)-G-(4-O-β)-G | Annotated |
| 4gg | 19.6 | 721.21185 | C37H37O15 | −2.7 | T-(4-O-β)-G-(4-O-β)-G | Characterized |
| 4gg | 19.8 | 721.21251 | C37H37O15 | −1.8 | T-(4-O-β)-G-(4-O-β)-G | Annotated |
| 4gg | 20.0 | 721.21093 | C37H37O15 | −4 | T-(4-O-β)-G-(4-O-β)-G | Annotated |
| 4sg | 19.8 | 751.22302 | C38H39O16 | −1.8 | T-(4-O-βt)-S-(4-O-βt)-G | Identified |
| 4sg | 20.3 | 751.22338 | C38H39O16 | −1.3 | T-(4-O-βe)-S-(4-O-βt)-G | Identified |
| 4sg | 20.6 | 751.22316 | C38H39O16 | −1.6 | T-(4-O-β)-S-(4-O-β)-G | Characterized |
| 4sg | 21.0 | 751.22285 | C38H39O16 | −2 | T-(4-O-β)-S-(4-O-β)-G | Characterized |
| 4gg′ | 22.7 | 763.22264 | C39H39O16 | −2.3 | T-(4-O-β)-G-(4-O-β)-G′ | Annotated |
| 4g′g | 23.2 | 763.22198 | C39H39O16 | −3.1 | T-(4-O-β)-G′-(4-O-β)-G | Annotated |
| 4g′g | 23.5 | 763.22264 | C39H39O16 | −2.2 | T-(4-O-β)-G′-(4-O-β)-G | Annotated |
| 4g′g | 24.0 | 763.22147 | C39H39O16 | −3.8 | T-(4-O-β)-G′-(4-O-β)-G | Annotated |
| 5gs′′ | 24.3 | 879.24808 | C47H43O17 | −2.8 | T-(4-O-β)-G-(5-β)-S′′ | Characterized/annotated |
| 5gs′′ [5g′′s] | 25.2 | 879.24942 | C47H43O17 | −1.3 | T-(4-O-β)-G-(5-β)-S′′ [T-(4-O-β)-G′′-(5-β)-S] | Characterized |
| 5gs′′ | 25.7 | 879.24975 | C47H43O17 | −0.9 | T-(4-O-β)-G-(5-β)-S′′ | Characterized/annotated |
| 5gs′′ [5g′′s] | 26.3 | 879.24928 | C47H43O17 | −1.5 | T-(4-O-β)-G-(5-β)-S′′ [T-(4-O-β)-G′′-(5-β)-S] | Characterized |
| 5gs′′ [5g′′s] | 26.9 | 879.24915 | C47H43O17 | −1.6 | T-(4-O-β)-G-(5-β)-S′′ [T-(4-O-β)-G′′-(5-β)-S] | Characterized |
| 5gs′′ [5g′′s] | 27.4 | 879.24823 | C47H43O17 | −2.7 | T-(4-O-β)-G-(5-β)-S′′ [T-(4-O-β)-G′′-(5-β)-S] | Characterized |
| 4g′′g [4gg′′] | 24.8 | 867.24907 | C46H43O17 | −1.7 | T-(4-O-β)-G′′-(4-O-β)-G [T-(4-O-β)-G-(4-O-β)-G′′] | Characterized |
| 4g′′g [4gg′′] | 25.0 | 867.24993 | C46H43O17 | −0.7 | T-(4-O-β)-G′′-(4-O-β)-G [T-(4-O-β)-G-(4-O-β)-G′′] | Characterized |
| 4g′′g [4gg′′] | 25.7 | 867.24982 | C46H43O17 | −0.9 | T-(4-O-β)-G′′-(4-O-β)-G [T-(4-O-β)-G-(4-O-β)-G′′] | Annotated |
| 4gg′′ | 26.0 | 867.24835 | C46H43O17 | −2.6 | T-(4-O-β)-G-(4-O-β)-G′′ | Annotated |
| 4g′′g [4gg′′] | 26.3 | 867.24938 | C46H43O17 | −1.4 | T-(4-O-β)-G′′-(4-O-β)-G/T-(4-O-β)-G-(4-O-β)-G′′ | Characterized |
| 4g′′g [4gg′′] | 26.5 | 867.24895 | C46H43O17 | −1.9 | T-(4-O-β)-G′′-(4-O-β)-G/T-(4-O-β)-G-(4-O-β)-G′′ | Characterized |
| 4gs′′ | 26.2 | 897.25787 | C47H45O18 | −3.6 | T-(4-O-β)-G-(4-O-β)-S′′ | Annotated |
| 4gs′′ | 26.4 | 897.25903 | C47H45O18 | −2.3 | T-(4-O-β)-G-(4-O-β)-S′′ | Annotated |
| 4gs′′ | 26.5 | 897.25803 | C47H45O18 | −3.5 | T-(4-O-β)-G-(4-O-β)-S′′ | Annotated |
| 4gs′′ | 26.7 | 897.25813 | C47H45O18 | −3.4 | T-(4-O-β)-G-(4-O-β)-S′′ | Annotated |
| 4gs′′ | 26.9 | 897.25816 | C47H45O18 | −3.3 | T-(4-O-β)-G-(4-O-β)-S′′ | Annotated |
a
Identified indicates a structure confirmed by comparison with the synthesized authentic compound; annotated indicates a rather firm structural elucidation based on comparison of the MSn spectrum with those of identified structural analogs and on the accurate m/z value; characterized indicates a fairly high degree of certainty in the structural elucidation that is based on the MSn spectral interpretation, accurate m/z value, and data available from the literature and public databases. In shorthand names, t and e descriptors are for threo (= syn) and erythro (= anti) isomers. tR = retention time.