Andy J Pérez

Publications15
h-index6
Citations108
Highly Influential Citations3
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Phenolic Profile of Grape Canes: Novel Compounds Identified by LC-ESI-LTQ-Orbitrap-MS
Grape canes (Vitis vinifera L.) are a viticulture industry by-product with an important content of secondary metabolites, mainly polyphenols with a broad spectrum of demonstrated health benefits.… Expand
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Triterpenoid Components from Oak Heartwood (Quercus robur) and Their Potential Health Benefits.
For centuries oak wood (Quercus robur) has been used in aging of wines and spirits, which is based on pleasant flavors given to beverages by phenolics transferred to the liquid during the maturation… Expand
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Isolation and structural determination of triterpenoid glycosides from the aerial parts of alsike clover (Trifolium hybridum L.).
Five azukisapogenol glycosides (1-5) have been isolated from the aerial parts of alsike clover (Trifolium hybridum L.), and their structures were elucidated by combined spectroscopic, spectrometric… Expand
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Phytotoxic steroidal saponins from Agave offoyana leaves.
A bioassay-guided fractionation of Agave offoyana leaves led to the isolation of five steroidal saponins (1-5) along with six known saponins (6-11). The compounds were identified as… Expand
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Bioactive steroidal saponins from Agave offoyana flowers.
Bioguided studies of flowers of Agave offoyana allowed the isolation of five steroidal saponins never described previously, Magueyosides A-E (1-5), along with six known steroidal saponins (6-11). The… Expand
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Characterization of three saponins from a fraction using 1D DOSY as a solvent signal suppression tool. Agabrittonosides E–F. Furostane Saponins from Agave brittoniana Trel. spp. Brachypus
A careful NMR analysis, especially by 1D TOCSY and 1D ROESY, of a refined saponin fraction allowed us to determine the structure of three saponins from a polar extract of Agave brittoniana Trel. spp.… Expand
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Triterpenoid saponins and C-glycosyl flavones from stem bark of Erythrina abyssinica Lam and their cytotoxic effects.
ABSTRACT Six new compounds including two oleanane-type triterpenoid saponins ( 1 , 2 ) and four C -glycosyl flavones ( 3 – 6 ), along with a known saponin ( 7 ), three di- C -glycosyl flavones ( 8 –… Expand
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Steroidal Saponins from Furcraea hexapetala Leaves and Their Phytotoxic Activity.
Four new steroidal saponins (1-4) along with 13 known saponins were isolated from the leaves of Furcraea hexapetala. The new compounds were identified as (20R,22R,25R)-3β-hydroxy-5α-spirostan-12-one… Expand
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Ultrahigh-Performance Liquid Chromatography-High-Resolution Quadrupole Time-of-Flight Mass Spectrometry Based Metabolomics Reveals Key Differences between Brachiaria decumbens and B. brizantha, Two…
Several species of Brachiaria (Poaceae) currently cover extensive grazing areas in Brazil, providing valuable source of feed for a large cattle population. However, numerous cases of toxicity… Expand
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Fingerprinting of strong spermatogenesis steroidal saponins in male flowers of Phoenix dactylifera (Date Palm) by LC-ESI-MS
Abstract A fingerprint of steroid saponins, the major constituent in 80% methanolic fraction from the male flowers of Phoenix dactylifera has been established. Under ESI-MS/MS conditions, the… Expand
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