Development and validation of analytical method by HPLC-UV-DAD for quantification and seasonal studies of galloylquinic compounds from Copaifera langsdorffii leaves.

Author(s)

Erick Vicente da Silva Motta

• Document type: Master's Dissertation
• Press: Ribeirão Preto.
• Institution: Universidade de São Paulo (USP). Faculdade de Ciências Farmacêuticas de Ribeirão Preto (PCARP/BC)
• Defense date: 2014-03-24

Examining board members

Jairo Kenupp Bastos; Alberto Jose Cavalheiro; Jonas Augusto Rizzato Paschoal

• Advisor: Jairo Kenupp Bastos

Abstract

Copaifera langsdorffii (Fabaceae, Caesalpinioideae), popularly known as \"copaíba\", \"copaibeira\" or \"pau d\'oleo\", is a large tree widely distributed in Brazil, from Amazon rainforest to savannah vegetation. Its oleoresin, composed mainly of sesquiterpenes and diterpenes, is widely used in folk medicine to treat inflammatory and infectious disorders. On the other hand, studies about its leaves, composed mainly of flavonoids and galloylquinic acid derivatives, are scarce. Therefore, it was proposed to isolate leaves major compounds, to develop and validate an analytical method by HPLC-UV-DAD, as well as to udertake seasonal studies. The crude extract of the leaves was partitioned with solvents of increasing polarity: dichloromethane, ethyl acetate and n-buthanol, in sequence. Chemical profiles of n-buthanol and aqueous fractions showed to be composed of polar compounds, especially galloylquinic acid derivatives. These compounds were isolated by gel permeation chromatography using Sephadex LH-20 and preparative high-performance liquid chromatography. The HPLC-UV-DAD analyses were carried out on a Synergi Polar-RP (100 x 3.0 mm, 2.5 ?m) column. The mobile phase was made up of formic acid-water (0.1:99.9, solvent A), and isopropanol-methanol-acetonitrile (0.5:4:6, solvent B). The elution gradient was A:B (90:10 to 85:15) in 8.33 minutes, followed by A:B (85:15 to 64:36) up to 29.17 minutes using a flow rate of 0.68 mL/ min. The seasonal studies were performed from 10 C. langsdorffii accesses grown on Beija-Flor farm (Cajuru/SP). From the aqueous fraction it was isolated and identified 16 galloylquinic acid derivatives: 5\'-O-methyl-3-Ogalloylquinic acid (GQA-1), 5\'\'-O-methyl-3,4-di-O-galloylquinic acid (GQA-2), 5\',5\'\'-di-Omethyl- 3,4-di-O-galloylquinic acid (GQA-3), 3,4-di-O-galloylquinic acid (GQA-4), 5\'\'-Omethyl- 3,5-di-O-galloylquinic acid (AGQ-5), 5\'-O-methyl-3,5-di-O-galloylquinic acid (GQA-6), 5\'-O-methyl-3,4-di-O-galloylquinic acid (AGQ-7), 5\',5\'\'-di-O-methyl-3,5-di-Ogalloylquinic acid (GQA-8), 5\',5\'\'-di-O-methyl-4,5-di-O-galloylquinic acid (GQA-9), 3,5-di- O-galloylquinic acid (GQA-10), 4,5-di-O-galloylquinic acid (GQA-11), 5\'-O-methyl-4,5-di- O-galloylquinic acid (GQA-12), 5\'\'-O-methyl-4,5-di-O-galloylquinic acid (GQA-13), 3,4,5- tri-O-galloylquinic acid (GQA-14), 5\'\'-O-methyl-3,4,5-tri-O-galloylquinic acid (GQA-15), 5\',5\'\',5\'\'\'-tri-O-methyl-3,4,5-tri-O-galloylquinic acid (GQA-16). Furthermore, through HPLC-MS analysis it was identified additional 10 galloylquinic acid derivatives: 3-Ogalloylquinic acid, 4-O-galloylquinic acid, 5-O-galloylquinic acid, 5\'-O-methyl-4-Ogalloylquinic acid, 5\'-O-methyl-5-O-galloylquinic acid, 5\'-O-methyl-3,4,5-tri-Ogalloylquinic acid, 5\'\'\'-O-methyl-3,4,5-tri-O-galloylquinic acid, 5\',5\'\'-di-O-methyl-3,4,5-tri- O-galloylquinic acid, 5\',5\'\'\'-di-O-methyl-3,4,5-tri-O-galloylquinic acid, 5\'\',5\'\'\'-di-O-methyl- 3,4,5-tri-O- galloylquinic acid. The HPLC developed method was suitable to quantify nine galloylquinic derivatives (GQA-1, GQA-5, GQA-6, GQA-7, GQA-8, GQA-9, GQA-10, GQA-15, GQA-16) and two flavonoids, quercitrin and afzelin, related to the selectivity, linearity, sensitivity, precision and accuracy parameters. Through multivariate statistical analysis, it was possible to conclude that all ten diferrent populations of C. langsdorffii cultivated displayed similar qualitative and quantitative chemical profiles among isolated months and different quantitative profiles among different months. (AU)

• FAPESP's process: 12/01336-0 - Development of analytical method by high performance liquid chromatography for quantification of galloylquinic compounds isolated from Copaifera langsdorffii Desf. leaves and its application in seasonal analysis.
• Grantee: Erick Vicente da Silva Motta
• Support Opportunities: Scholarships in Brazil - Master