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Table 1 HPLC-DAD and ESI-MS data for quercetin derivatives from the leaves of B . longifolia

From: Quercetin and quercetin 3-O-glycosides from Bauhinia longifolia (Bong.) Steud. show anti-Mayaro virus activity

   t R [M-H] λmax
Compound Name (min) ( m/z) (nm)
1 Guaijaverin 12.7 433 255, 354
2 Quercetin 22.1 301 255, 368
3 Quercitrin 14.4 447 256, 352
4a Isoquercitrin 9.3 463 256, 356
4b Hyperin 10.2 463 255, 356
  1. tR – retention time (in min).
  2. [M-H]- – pseudo molecular ion observed on the ESI-MS spectra at the negative mode.
  3. λ max – maximum absorption bands in the UV spectra.