Phytochemical investigation of Erythroxylum rimosum O. E. Schulz

Erythroxylum rimosum O. E. Schulz is a species restricted to the northeastern region of Brazil, found in the states of Ceará, Piauí, Sergipe and Bahia, occurring respectively in Restinga, Cerrado and Carrasco vegetation. The study of the extract of E. rimosum, reported the identification of pentacyclictriterpenes, steroid, tropic alkaloid and flavonoids. Thus, a chromatographic study of its crude ethanol extract was carried out. The botanical material of the aerial parts was collected in the municipality of Pirambu, state of Sergipe and identified by Profa. Dr. Ana Paula do Nascimento Prata, Department of Biology, Federal University of Sergipe (FUS). It was then oven dried with circulating air at an average temperature of 40 ° C, ground in a mechanical mill and subjected to steeping with 95% EtOH. The BSE (105 g) was dissolved in a methanol: water (7: 3 v / v) solution and partitioned with the following solvents: hexane, dichloromethane and ethyl acetate. The AcOEt phase was subjected to column chromatography, using silica gel 60 as stationary phase and as mobile phase, the Hex, AcOEt and MeOH solvents, pure and in binary mixtures in increasing order of polarity. This yields 30 fractions which after analytical thin layer chromatography (TLC) were pooled according to their respective retention factors (Rfs). The fractions from 23 to 25 were submitted to High Performance Liquid Chromatography Coupled to a Diode Array Detector (HPLC-DAD). Getting yourself 8 fractions. From fractions 4 and 2 the coded substances of Er-1 and Er-2 respectively were obtained. They have had their structures identified by ¹H-NMR, ¹³C, and two-dimensional techniques in comparison with literature data, namely: kaempferol-3-rutinoside and quercetin-3-O-β-D-glucopyranoside-α- L-raminoside, two glycosylated flavonoids that are being reported for the first time in the study species.