Xanthchrysones A-C: Rearranged Phenylpropanoyl-Phloroglucinol Dimers with Unusual Skeletons from .

Three pairs of dimeric phenylpropanoyl-phloroglucinol enantiomers, (+)- and (-)-xanthchrysones A-C [(+)- and (-)-], as well as their postulated biosynthetic precursors, were isolated and identified from the leaves of . Compound featured an unprecedented bis-phenylpropanoyl-benzo[]cyclopent[] oxepine tricyclic backbone. Compounds and represent the first examples of 1-(cyclopentylmethyl)-3-(3-phenylpropanoyl)benzene scaffold. The structures and absolute configurations of - were determined by spectroscopic and X-ray diffraction analysis as well as electronic circular dichroism (ECD) calculation. Both (+)- and (-)- showed moderate antibacterial activities including several multidrug-resistant strains.