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Four enantiomerically pure new alpha-tetralones, (4S)- and (4R)-5-hydroxy-4-methoxy-alpha-tetralones and (4S)- and (4R)-5,8-dihydroxy-4-methoxy-alpha-tetralones were isolated, together with five… Continue Reading
Five new glycosides, quercetin 3′-O-β-d-galactopyranoside (1), quercetin 3-O-(2″-acetyl)-β-d-glucopyranoside (2), 4,6-dihydroxy-2-methoxyphenyl 1-O-β-d-glucopyranoside (3),… Continue Reading
Twenty-two known constituents, including four xanthones, nine flavonoids and nine phenolic glycosides, were isolated from Hypericum erectum Thunb. Their structures were elucidated on the basis of… Continue Reading
BACE1 inhibitors hold potential as agents in disease-modifying treatment for Alzheimer’s disease. BACE2 cleaves the melanocyte protein PMEL in pigment cells of the skin and eye, generating melanin… Continue Reading
The structures of previously reported oleoacteoside and oleoechinacoside, both being caffeoyl phenylethanoid glycosides (acteoside, echinacoside) esterified with an oleoside 11-methyl ester, were… Continue Reading