Table 4 Diagnostic 1 H and 13 C NMR sulfation shifts for flavonoid sulfates 3, 6, 7, 11 – 15 in Phenolic fingerprints of the Pacific seagrass Phyllospadix torreyi - Structural characterization and quantification of undescribed flavonoid sulfates

Name: Table 4 Diagnostic 1 H and 13 C NMR sulfation shifts for flavonoid sulfates 3, 6, 7, 11 – 15 in Phenolic fingerprints of the Pacific seagrass Phyllospadix torreyi - Structural characterization and quantification of undescribed flavonoid sulfates
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Published: 2025-04-05 09:38:23
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Table 4 Diagnostic 1 H and 13 C NMR sulfation shifts for flavonoid sulfates 3, 6, 7, 11–15 (DMSO‑ d); values are expressed in ppm as δ (flavonoid sulfate) - δ (flavonoid). AglyconSulfate derivativesH-8H-2′H-5′H-6′C-7C-8C-2′C-3′C-4′luteolin 5-methyl ether7,3′-disulfate: 3+0.66+0.53+0.12+0.344.3+3.1+7.24.2+3.4luteolin7-sulfate: 11+0.58+0.060.01+0.044.7+3.60.30.8+0.43′-sulfate: 13+0.06+0.49+0.08+0.28+0.20+7.24.3+3.07,3′-disulfate: 6+0.55+0.54+0.11+0.314.9+3.6+7.04.4+3.6nepetin7-sulfate: 12+0.85+0.06+0.0100.1+4.0+0.1+0.5+1.53′-sulfate: 140.32+0.39+0.08+0.13+1.1+1.2+3.94.2+5.17,3′-disulfate: 7+071+0.570.11+0.330.1+4.2+4.24.1+3.3hispiduline7-sulfate: 15+0750.01+0.040.014.8 a +0.4 a a Values determined from HSQC.

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2025-04-04