Chemical constituents from the n-butanol portions of the fruits of Eucalyptus globulus

Phytochemical studies on the fruits of Eucalyptus globulus led to the isolation of twelve compounds. The structures of these compounds were elucidated as: ellagic acid( 1 ), 3-O-methylellagic acid 4′-O-α-rhamnopyranoside( 2 ), valoneic acid dilactone( 3 ), isobiflorin( 4 ), biflorin( 5 ), 8-β-C-glucopyranosyl-5, 7-dihydroxy-2-isobutylchromone( 6 ), 8-β-C-glucopyranosyl-5, 7-dihydroxy-2-isopropylchromone( 7 ), quercetin 3-O-β-D-glucopyranoside( 8 ), quercetin 3-O-β-D-glucuronide-6″-methyl ester( 9 ), (+)-lyoniresin-4-yl β-D-glucopyranoside( 10 ), cypellocarpins A( 11 ), and eucaglobulin 1( 12 ), by means of spectroscopic analyses(ESI-MS, ¹H NMR and ¹³C NMR). Compounds 3-10 were isolated from this plant for the first time.