Table 3 Main metabolites detected in active fraction of Cytisus striatus leaves.

From: Looking to nature for a new concept in antimicrobial treatments: isoflavonoids from Cytisus striatus as antibiotic adjuvants against MRSA

 

Chemical formula

1H-NMR (CD3OD-d4; δ (ppm))

Apigenin

C15H9O5

6.19 (H6, d, J = 1.9), 6.43 (H8, d, J = 1.9), 6.57 (H3, s), 6.92 (H3′/H5′, d, J = 8.8), 7.84 (H2′/H6′, d, J = 8.8)

Chrysin

C15H10O4

6.18 (H6, d, J = 1.9), 6.42 (H8, d, J = 1.9), 6.70 (H3, s), 7.56 (H3′/H4′/H5′, m); 7.97 (H2′/H6′, d, J = 7.8)

Luteolin

C15H9O6

6.19 (H6, d, J = 1.9), 6.42 (H8, d, J = 1.9), 6.53 (H3, s), 6.89 (H5′, d, J = 8.4), 7.37 (H6′, dd, J = 8.4, 1.9), 7.37 (H2′, d, J = 1.9)

Daidzein

C15H10O4

6.83 (H3′/H5′, d, J = 8.4), 6.84 (H8, d, J = 1.8), 6.92 (H6, dd, J = 9.0, 2.4), 7.36 (H2′/H6′, d, J = 8.4), 8.04 (H5, d, J = 8.4), 8.12 (H2, s)

3′-Hydroxydaidzein

C15H9O5

6.79 (H8, d, J = 1.8), 6.82 (H5′/H6′, m), 6.90 (H6, dd, J = 9.0, 2.4),7.00 (H2′, d, J = 1.8), 8.02 (H5, d, J = 8.4), 8.08 (H2, s),

Genistein

C15H9O5

6.20 (H6, d, J = 2.1), 6.32 (H8, d, J = 2.1), 6.84 (H3′/H5′, d, J = 8.4), 7.36 (H2′/H6′, d, J = 8.4), 8.04 (H2, s)

2′-Hydroxygenistein

C15H10O6

6.15 (H6, d, J = 1.8), 6.26 (H8, d, J = 1.8), 6.37 (H5′, dd, J = 7.8, 2.4), 6.39 (3′H, d, J = 1.8), 7.03 (H6′, d, J = 8.4), 7.95 (H2, s)

  1. 1H-NMR data are measured in ppm and coupling constants (J) in Hertz.
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